Quartz Watches and Batteries

Learn about watch batteries and their construction and check whether you have the right type battery for your watch. Remember, the watch cell will sit in there until its end of life with varying temperature and maybe even humidity if your o-ring ages before the battery dies. My watch tutor Rob B wrote this great article Watch Battery Types and Construction. If you are new to watch cells, have a look at this article first.

Second: I am speaking from experience - do remove or replace a dead watch cell as soon as possible. The longer you wait, the higher the risk that the battery starts leaking. And that is very often the end of a Quartz caliber. If possible, use only watch cells that are "fresh". A good watch parts or online shop will tell you the expiration date of the cells.

Third: Casio and similar electronic movements often contain springs that are sometimes loosely inserted into movement holes. Casio case backs are normally held by 4 Allen screws. Hold the case back down while removing all 4 screws. Then carefully lift it and make sure, none of these loose springs fly off. Not all Casio movements feature these loose springs.

Notes regarding the table below:
If there is no comment in the last column, that means that watch was easy to open. Screwed case backs are almost never a problem with a good opener. The Bergeon 5700Z for screwed case backs stands out as one expensive and professional option, a less expensive JAXA or similar opener are equally suited. Please see my case opener overview (opens new window) table to see common openers for screwed case backs.
Snap-on case backs can be difficult and tricky to open without leaving opening marks. If the snapped-on case back does not budge, bring the watch to the watchmaker. At the bottom of case opener overview page, you will find some snap-on case openers. Hints on how to use them are on this page.
Watches that are published on the RWC collection table, are directly linked to the front view of given watch. The front view page will open in a new window.

Reto's Quartz Watches
Watches chronological as opened, use Browser's Edit/Find on this page ... to find a model/movement please	Type	Movement	Battery	Alternative	Opening and setting hints
Raymond Weil Fidelio	Analog	ETA 255.411, 6 Jewels	R373	SR916SW
IWC Ingenieur	Analog	IWC Cal. 633	R397	SR726SW	Put the watch parallel to the big arm of the Bergeon 5700Z, mount one bracelet end to the arm with a Scotch tape
IWC Ultra Sportivo	Analog	IWC Cal. 631	R397	SR726SW
Jaeger LeCoultre Kryos	Analog	JLC Cal. 631	R397	SR726SW
Jaeger LeCoultre Heraion	Analog	JLC Cal. 631	R397	SR726SW
Baume et Mercier Shogun	Analog	ETA 255.411, 6 Jewels	R373	SR916SW	Screwed back! Opens with Bergeon 5700 suction pad!
Heuer 2000 Quartz Chronograph	Analog	ETA 955.232, 26 Jewels	R395		Put the watch parallel to the big arm of the Bergeon 5700Z, mount one bracelet end to the arm with a Scotch tape
Ronda Quartz	Analog	Ronda Cal. 1377	R303	SR44SW
Tissot Digital F1 Quartz	Digital	Cal. 4311		2 x RW47
Breitling Tabarly	Analog	ESA 965 312		RW311
Mirexal Gold-Colored	Analog	ETA 555.415, 1 Jewel	R371	SR920SW
Heuer SEL Gold-Plated 10 m	Analog	ETA 955.412, 7 Jewels	R395
Tissot PRX 100 Quartz 2 Tone	Analog	ETA 955.112, 7 Jewels	R371	SR920SW
Swatch Skeleton Quartz	Analog		R390	SR1130SW
Certina DS Quartz Silver Dial 2 Tone Flex Bracelet	Analog	ETA 955.112, 7 Jewels	R371	SR920SW	Bergeon opener, watch in movement holder! Scotch tape to protect case!
Bucherer Steel, Black Mirror Bezel	Analog	ETA 955.412, 7 Jewels	R371	SR920SW
Revue Thommen Greenmark	Analog/Counter	ETA 955.412, 7 Jewels	R371	SR920SW
Citizen Minute Repeater Perpetual Calendar	Analog	Cal. 6760	R395	SR927SW
Raymond Weil Flat Gold Plated Black Strap	Analog	ETA 210.001, 8 Jewels	R44, 7.9 mm	Ucar 346
Emilio Carducci	Analog	ETA 210.001, 8 Jewels	R44, 7.9 mm	Ucar 346
Citizen Chrono assembled in FR Germany	Analog	Cal. 6850A	R395	SR927SW
Longines Charleston 30 min Chrono	Analog	ETA 255.241, 16 Jewels	R395	SR927SW
Rado Coupole black strap	Analog	ETA 956.412, 7 Jewels	R362	SR721SW
Camel Trophy Multichrono Snap On back	Analog	Morioka Tokei VD01A		Sony 1130
Camel Trophy Chronograph screwed back	Analog	Miyota 3S10, 12 Jewels	R395	SR927SW
Citizen Perma Bright	Analog	Miyota 7933, 7 Jewels	UC373	SR916SW
Breil Chrono	Analog	ETA 955.232, 20 Jewels	Ucar 395
Seiko Multifunction via Crown	Analog	Seiko 6M25B, Battery leaked!!!	Seikazin 920
Citizen Alarm Chrono gold-plated white face	Analog	Miyota 3S10A, 12 Jewels	R395	Sony 927
Citizen Ti Chrono Gold Hands	Analog	Miyota 3S10A, 12 Jewels	R395
Tissot TwoTimer 2 Tone Black Rubber strap	Analog-Digital	ETA 958.335, 7 Jewels	R370	SR920W SR920SW=R371
Casio Personal DB AB-550 Silver Face	Analog-Digital	Cal. 372		LR1120
Casio 1/1000th Second	Analog-Digital	Cal. 373	R395	SR927SW
Movado Museum Watch	Analog	ETA 956.042	R364	SR621W
Givenchy 2-Tone	Analog	ETA 955.414, 7 Jewels	R371, 9.5 mm	SR920SW
Mirexal Titanium	Analog	ETA 955.414, 7 Jewels	R371, 9.5 mm	SR920SW
W. Honegger	Analog	ETA 955.412, 7 Jewels	R371	SR920SW	Open with stack of coins and Bergeon tool. Take strap off before trying lift the case back. A basic rule for almost any snap-on case back watch.
TRICO Promotional Watch (Mike F.)	Analog	ISA 268	R364	SR621W	HOROTEC Case Crab small claws, one at groove
Christ Split Second Quartz Chrono	Analog	ETA 251.262	R394	SR936SW	Bergeon 5700, take strap off and use holders at lug side
Certina Triple Date Moonphase	Analog	ETA 255.483, 7 Jewels	R373	SR916SW
Piquot Meridien	Analog	M1811 (case back inscription)	R362	SR721SW	50 Satang coin matches battery cover perfectly
Fendi Gents	Analog	ETA 980.005, 7 Jewels	R379	SR521SW	Difficult to open! Take bracelet off! Use HOROTEC Case crab wide claws, position at lug side
Fendi Ladies	Analog	ETA 980.005, 7 Jewels	R379	SR521SW	Difficult to open! Take bracelet off! Use HOROTEC Case crab small claws, case is a bit up on one side, but one claw there
Tissot Rockwatch	Analog	ETA 976.001	R321	SR616SW
Certina DS Quartz 2 Tone Grey Dial Brown Strap	Analog	ETA 955.412, 7 Jewels	R317	SR516SW	Careful, Bergeon opener will leave marks on inner lug side!
Citizen Alarm World Time Chrono Slide Ruler Magic Light	Analog-Digital	Miyota C460-Q00788	R395	SR927SW
Innovative Time Navigator Melody Alarm	Digital	Chinese Movement	???
Quasar Alarm Chrono	Analog-Digital	Miyota TL11, 1 Jewel	R395	SR927SW
Seiko 6A40 Date Hand Moonphase Chrono	Analog	7T36B	R395	SR927SW	Gasket ring replaced, careful when opening and closing, new ring is a bit tight
Citizen Racing Timer	Analog-Digital	C070-088476	R395	SR927SW	JAXA opener, 5700 can not be used if rubber strap is not taken off and this is a headache
Citizen Aqualand Analog 2Tone	Analog	5810-F80014		CR2016	JAXA opener with round bits, opens easily, RESET! Crown out, all 3 PB in for 2 secs, no hint inside watch!
Seiko Alarm Timer Chrono SEL 2 Tone Blue Face	Analog	7T42A	R395	SR927SW	Case Opener Knife sharp blade plus thin plastic card
Mayco Alarm Chrono Pocket Watch (not on website)	Analog-Digital	Hong Kong, 1 Jewel	R392 (Union Carbide)	SR41W
Tissot TwoTimer 2 Tone Bracelet	Analog-Digital	ETA 958.331, 7 Jewels	R373	SR916SW	Case Opener Knife sharp blade plus thin plastic card, squeeze sharp blade in on one long side and slightly pry open, then use card
Citizen Solar Alarm Chrono Butterfly solar cells	Analog-Digital	C030, 1 Jewel	No. 280-403		Note on Battery: This Nr. Is the secondary Battery and should be an original Citizen battery according to the sticker inside!
Casio Expensive Hotbiz HBZ-100	Digital	Cal. 1811		CR2016	Case Opener Knife sharp blade parallel on one side
Casio Speed Memory 100 AW-20	Analog-Digital	Cal. 384		Sony 1120
Casio DBX-100, LCD defect, Keyboard rubber sticky!	Digital	Cal. 216		CR1220 x 2	Screws were tight like hell, one screw damaged but filed back into shape
Raymond Weil 18 K Electro Gold-Plated Dress Black Strap	Analog	ETA 955.412, 7 Jewels	R371	SR920SW	Not easy to open, put scotch tape on case first and use Bergeon Opener
Casio DataBank AB-500 (DEC teaching schedule) White Face	Analog-Digital	Cal. 386	R395	SR927SW
Casio DataBank DBX-112 Grey Resin Case and Back, Metal Bracelet	Digital	Cal. 642		CR1616
Casio DBC-610 Historic First Data Base!	Digital	Cal. 676		CR1616
Casio Personal DB AB-550 Dark Grey Face	Analog-Digital	Cal. 372	R395	SR927SW	What a surprise, that "metal" case was painted Resin, well, well …
Casio Analog-Digital with Thermometer AW-10	Analog-Digital	Cal. 378	R395	SR927SW
Dunhil Facet Quartz	Analog-Digital	ETA 956.112, 7 Jewels	R377	SR626SW	Very disappointed to see that Dunhill Hong Kong Service Center replaced the battery, did not replace the O-Ring, but squeezed in the old O-Ring again that was too wide already and would not fit in the groove. Knowing this would not be water-resistant, they used a silicon paste that was rock hard after almost 2 years. That is the last time I give a watch to them, HKD 80 for such a "screw-up"
Tissot PR 50 Chrono Black Face and Strap	Analog	ETA 251.272, 22 Jewels	R394	SR936SW	Careful when opening, case back pretty tight, protect lugs when using Bergeon tool
Pierre Balmain Arabesque Chrono	Analog	ETA 251.272, 22 Jewels	R394	SR936SW	Snap on back, careful, put scotch tape on case, there is enough space for the tape opposite the crown. If case back does not budge, use the HOROTEC Case Crab
Omega Seamaster Quartz Lillehammer 1994 L.E.	Analog	ETA 255.461, 6 Jewels	R395	SR927SW	JAXA with round bits
Seiko Intelligent Calendar Sports 150 D.Blue Strap	Analog	6M32	R395	SR927SW	Careful when closing, O-Ring is new and a bit tight
Seiko Macchina Sportiva	Analog	7T32B	R395	SR927SW
Seiko 150 Sports Black Chrono Black Strap	Analog	7T42B	R395	SR927SW
Ellesse Mid-Size Diver Black Strap	Analog	ETA 955.414, 7 Jewels	R371	SR920SW
Seiko Multifunction Stainless via Crown and Date Window	Analog	6M26A	R395	SR927SW
Bucherer by Alfex Anthracite Dial Black Strap	Analog	ETA 955.412, 7 Jewels	R395	SR927SW
Citizen Spacemaster RC Grey Strap	Analog	Miyota 8410M, 9 Jewels		CR2032	The 2032 is about double the thickness of the 2016
Casio Ana-Digi 2-Tone with 2-Tone Bracelet curved LCD segment at 6 o'clock AD-702	Analog-Digital	Cal. 388		SR920W
Citizen 3 Band RC with Antenna in Crystal	Analog	Miyota Cal. 7400M		CR2016
Casio Telememo 30 DBW-320 Metal Case Brown Strap	Digital	Cal. 838		CR2016
Timex 1st Indiglo Series Watch Prague 1993	Analog	TIMEX Cal. B30 Philippines	VARTA 376	R376
Citizen Yacht Timer	Analog-Digital	Miyota C211, 0 Jewels	R395	SR927SW
Citizen Ana-Digi with green EL Backlight and LAP Timer	Analog-Digital	Miyota C401	R395	SR927SW
Seiko Ti Alarm Chrono with Ti Bracelet (expensive!)	Analog	7T32B	R395		Careful when closing, original rectangular O-Ring replaced with round O-Ring. Interesting, so many Seiko O-Rings were found to be squeezed to a much bigger diameter and thus needed replacing even the rubber was still OK. Never found on a Citizen or Casio, do those companies use different rubber? Or are the grooves deeper in those watches and thus the pressure less?
Junghans RC Mega 2Tone	Analog-Digital	Junghans W605		CR2026	Put tape opposite the antenna side on the case and carefully use Bergeon opener. Case back opens OK, but gap is very tiny. Easy to slip off!
Raymond Weil Tango	Analog	ETA 955.412, 7 Jewels	R371	SR920SW	The snap-on Case Back groove is nice but the location close to the lug plus the fact that the case back sits very tight, make this watch extremly difficult to open. The HOROTEC Case Crab does not really help, because the case back sits very tight on the case. Use the Bergeon opener, there are some marks on the lugs, so no need to worry too much. And interesting, this watch had a battery replacement already, I bought it new from an inflight shop but the battery was definitely replaced. There were pretty big marks on the lug already, that is why I did not care too much when opening again. That is maybe how watches end up in inflight shops as promotions
Casio BGP-200 Blue Flight Planner with 3 World Times	Digital	Cal. 931		CR2016
Calvin Klein by Swatch Group with Meshed Band	Analog	ETA 901.005	R321	SR616SW	Ladies' movement with huge spacer, careful when opening with Bergeon opener, protect lugs with thick paper first then pry open case back, there is a small mark on the lug
Timberland Chrono with Bordeaux Strap	Analog	Miyota 0S30, 0 Jewels	R394	SR936SW	Scotch tape on case back opposite crown, then Bergeon case back opener
Bucherer ATLETICO Quartz Alarm Chrono	Analog-Digital	ETA 251.265	R394	SR936SW	Protect case between lugs with double paper layer and pry open with Bergeon case back opener
Citizen Small Quartz Alarm Chrono (Interdiscount)	Analog	Miyota 6850A	R395	SR927SW	Take Bracelet off and use HOROTEC Case Crab between the lugs!
Rado CERAMIC Rubber Strap	Analog	ETA 956.112, 7 Jewels	R364	SR621W	Protect case with paper or scotch tape, use Bergeon opener, wiggle open
Timeforce Chrono Yellow Strap	Analog	Miyota Cal. 0S10, 0 Jewels	R395	SR927SW
Casio Hotbiz VDB-2010 with Touchscreen	Digital	Cal. 1554		CR2016
Casio Hotbiz DB-2000 with direction Keys	Digital	Cal. 1498		CR2016
Casio DBM-150 Black Resin, Silver EL Button, 1st Memory Protect	Digital	Cal. 1079		CR2016
Swatch Irony Chronograph	Analog	ETA 621 332	R394	SR936SW
Citizen Ana-Digi Diver Greenish Face with Red Frames	Analog-Digital	Miyota Cal. C500, 0 Jewels		CR2016	JAXA with round bits
Ellesse 2-Tone Alarm Chrono with Bracelet	Analog	Miyota Cal. 3S10, 12 Jewels	R395
Seiko Scrolling Stock Ticker Style Inverse LED	Analog-Digital	H021A	R390	SR1130SW
Seiko Blue Face Multifunction via Crown Alarm Chrono 2-Tone	Analog	6M25A, 5 Jewels	R390	SR1130SW
Seiko Alarm Chrono White Face Blue Subdials 2-Tone Bracelet	Analog	7T32B	R395	SR927SW
Accurist Alarm Chronograph	Analog	Miyota Cal. 6W50	R395	SR927SW
Casio Twincept ABX-620 1st Metal Twincept 2-Tone	Analog-Digital	Cal. 1353	R395	SR927SW
Casio Twincept ABX-632 2nd Metal Twincept 2-Tone	Analog-Digital	Cal. 1756		2 x LR1120
Casio MRG-100T Mr. G Titanium with Ti Bracelet (went to good a friend in NYC)	Digital	Cal. 1569		CR1216
Casio VDB-1000 1st Touchscreen, the smartest Casio ever!	Digital	Cal. 658		CR2016
Citizen Digital Aqualand with Data Transfer System to PC	Digital	Miyota Cal. D202		CR2025	Not as thick as the 2032, but thicker then the 2016. Battery weak announced by display in 1997 shortly after bought, watch kept running for 5 years on battery low display. Maybe the low batt threshold too high?
Casio ProTrek PRT-500 Twincept	Analog-Digital	Cal. 1376		CR2016
Casio TSR-100 Infrared Temperature Scanner	Digital	Cal. 1190		CR2025	Again, the IR scanner probably a bit thirstier thus a 2025
Casio AD-300 Illuminator Chronograph, one of the 1st EL Watches	Analog-Digital	Cal. 1320		CR 1616 + SR920	Sometimes you get more then you asked for. I have never seen a more awkward design from Casio. The watch consists of two layers and the top layer does not seem to have much more function then to contain the alarm buzzer, another chip and the CR1616 battery. The white plastic spacer serves as push-button spring, go figure! I strongly suspect, that this was one of the first EL Backlight watches and honestly, this does not really look like Casio development to me. I have seen el-cheapo Ana-Digis from Mainland China with exactly the same sandwich structure. EL was first patented by Timex and produced in Mainland China. Looks like Casio was really in a rush to adapt the technology. This design is simple a disappointment. It is mechanically elegant how the two movements stack on each other, but the spacer that holds the two movements down and serves as push-button springs is simple nonsense, sorry.
Casio ALT-6000 AltiBaroTemp First Twin Sensor	Digital	Cal. 950		CR2025
Casio CT-000 G-Cool	Digital	Cal. 1514		CR2016	First to bars have to be removed, then the case back opens, then a plastic spacer, a rubber layer, and the worst, a battery replacement instruction sticker on the battery holder and battery. If you are not careful when removing this, the movement could easily be destroyed.
Casio JG-100 Infrared Game Watch (Traffic Jam Watch)	Digital	Cal. 1268		CR2032	The IR beam needs power, thus a thick 2032 at work!
Casio CMD-40 Learning Wrist Commander (Second Model)	Digital	Cal. 1174		CR2032	An awkward design to retain the thick 2032. A little piece of rubber has to be squeezed into battery holder gap. The battery holder cannot be closed completely without a battery, careful when closing the case back without battery. Again IR at work, this time as remote controlling unit including learning function
Casio DBX-103 Black Resin, Black Case Back	Digital	Cal. 642		CR1616
Bulova Accutron	Digital	Bulova Cal. 218	Rayovac 344
Casio AW-38 (round, thin and nice design, two red buttons)	Analog-Digital	Cal. 747	Sony SR920W	R371
Casio AW-21U round Worldtimer with world map (given away)	Analog-Digital	Cal. 387	SR1120W
Casio ABX-50 (Databank round with Help function)	Analog-Digital	Cal. 788	SR927SW
Casio AB-50W (DataBank 50, rectangular)	Analog-Digital	CAl. 753	SR927SW		Watch rubber band cracked! Little Spring in Spacer! Incredible long battery life!
Aqua (Timex) Made in Philippines	Digital/Indiglo	No info	CR2016
Citizen Digital Surftimer	Digital	No info	CR2016		Quality of case back insufficient (oxidation) but great spring bars!
Millenium Watch (from parents, not on website)	Analog-Digital		SR1120W		Nice screwed case back
Minitz Quartz (Interdiscount, colorful Scuba style, not on website)	Analog	Miyota 1 Jewel	SR626SW
HP New Millenium free watch with printers	Analog	SII = SEIKO Instruments? PC-21S	SR262SW		Case back sits very loose!
Casio TRC-100 Triple Chrono	Digital	Cal. 999	CR2016
Casio Twincept Worldtimer ABX-53	Analog-Digital	Cal 1326	SR927SW
G-Shock DW-002	Digital	Cal. 1238	CR2016		out
Seiko Sports Chronograph 150 2 Tone White Face Gold Panda Eyes	Analog	Cal. 7T42	SR927SW		Push buttons need to be fixed
Sector Expander 140	Analog	Swiss Parts, China Movement	ETA 377	SR626SW	Movement low tier, case construction and quality great!
Omega Seamaster 100 Laps	Analog-Digital	Cal. ETA 251.251	R394	SR936SW	Opening instructions for this very tricky snap-on back. Module resets like a charm after a battery change. Like all ETA movemens by the way (I am not related with ETA but do love their calibers)
Seiko Titanium Perpetual Calendar SLL017P1	Analog	Cal. 8F32 (192kHZ, 6 times normal Quartz frequency)	CR2412		Setting instructions are important and need to be followed exactly
Seiko Perpetual Calendar 2100 GMT Case 0030		Cal. 8F56 based on 8F32 with GMT	CR2412		Setting instructions are important and need to be followed exactly
Citizen Wingman ca. 1997	Analog-Digital	Miyota 0 Jewels C080	SR927SW	R395	Analog part did not start after battery replacement. Also putting the watch on the Driving tool did not fix the problem. Rob disassembled the gear train and put it together again and that did the job. Just a bit of oiling obviously helped to fix the problem. But annoying as with most Citizen watches, the strap cracked!
Casio DB-56 W (super long battery life!)	Digital	Cal. 965	CR2016		Battery lasted 10 Years!
Givenchy gold-plated Dress Watch on black strap	Analog	ETA 956.112, 7 Jewels	R364	SR621W	Must use HOROTEC Case Crab. Use the white holder on one side, and one claw at 3 o'clock. Case back sits far too tight, lousy tolerances of J.B. Technologies, the distributors of the Givenchy watches. Probably fashion guys too.
Swatch Chrono Dark Green with Gold on Dial	Analog		R394	SR936SW
Swatch Chrono light green Neon case	Analog		R394	SR936SW
Swatch Chrono Pastel Colors pink band	Analog		R394	SR936SW
Swatch Chrono Navy Berry (red and white striped band)	Analog		R394	SR936SW
Swatch Chrono with Pastel Colors on dial and orange leather strap	Analog		R394	SR936SW
Swatch Scuba green face and orange band	Analog		R397	SR726SW
4 Swatches Set 700 Year CH Celebration	Analog		R390	SR1130SW	One Swatch for each official language of Switzerland: German, French, Italian and Raetoromanian designed by an artist from each region
LEVIS Promo watch (not on site)	Digital		R390	SR1130SW
SEIKO Perpetual Calendar "Discovery Series"	Analog	6M13A	SR927SW	R395	Important Note: the groove is in the case back and at 9 o'clock if the case is snapped on with the ship logo horizontally aligned. It is then fairly easy to lift the case back with about any snap-on case opener or case opener knife. After the case back is lifted, it can be fully opened by carefully driving a fingernail around the case back.
Timex Ironman	Digital	TIMEX Caliber M746/3-1 Timex Assembled in Philippines	CF2016
Rip Curl Digital ATS Oceantide #17106 (Made in Hong Kong)	Digital	China/Hong Kong caliber		CR2016
Casio G-Shock Fisherman (Sunrise, Sunset) DW-8600 Titanium Back	Digital	Caliber 1518		CR2016
Alfex Quartz Dress Watch	Analog	ETA 955.412, 7 Jewels	R395	SR927SW
Bulova Marine Star	Analog	Miyota AS10	Varta 399	Renata 399 or SR927W	Use the suction pad opener Bergeon 2533. Otherwise the bracelet needs to be removed Please note that this is the high drain version of the very popular low drain battery Varta 395, Renata 395 or SR927SW
Casio IA-1100 Personal Planner (given away, would not work after new battery inserted)	Analog-Digital	Casio Cal. 728	SR1120W	R391	Use the Bergeon opener at the 7 o'clock lug, case opens with a snap. Case can be closed with hands. Once more the miracle of electronic circuit boards shows. The analog part did not work at first after the battery change. I put the watch a short time on the Quartz Driving machine, to no avail. But suddenly after ca. 20 minutes of the new battery being inserted, the analog part started to work, miraculously!
Casio GIEZ Titanium GS-300	Analog-Digital	Casio Cal. 2301	SR920W+SR621W	R370+R364	AC (arrow points to circuit board) must be connected to battery + otherwise digital watch does not start. R364 is for analog part
TITAN EDGE	Analog	T9081-6J (TIL India)	SR712SW		TITAN makes a very clever groove into the case back at the lug at 5 o'clock. Use the black Bergeon opener with ease!
TIMEX Chronograph Blue Face	Analog	Miyota OS 10	SR927SW		No problem at all, case back opened (factory tightened) with Bergeon suction opener
TIMEX iControl Alarm REEF GEAR	Analog	TIMEX Philippine Caliber, no movement number visible due to insulation sheet on movement	Energizer CR2016		Very easy to open snap-on case thanks to groove at lug 11 o'clock. I used this Bergeon opener, my favorite for snap-on watch backs as found on most Quartz watches
Emirates Logo Watch (given away)	Analog	Miyota 1M12	Maxell SR621W	R364
SEIKO Sportura Ana-Digi World Timer Inverse LCD	Analog-Digital	SEIKO H023A	SEIKO SR1130W	R390
Casio PGW-92 Basketball Watch	Digital	Casio Cal. 978	CR2016		Band had been entirely deteriorated after 15 years when I rediscovered the watch in a box
Casio G-Shock MRG-130T with orange minute hand	Analog-Digital	Casio Cal. 2901	SR916W + SR621W	R373 + R 364
Casio Mr G MRG-1 Titanium Rubber	Digital	Casio Cal. 1556	CR2016		Bergeon Case Opener 5700Z used. Best practice is to remove the protective rubber cover from the watch head BEFORE OPENING THE WATCH.
Seiko World Time Chronograph "Discovery Series"	Analog	Seiko 6M15	SR927SW	R395	Important Note: the groove is in the case back and at 9 o'clock if the case is snapped on with the ship logo horizontally aligned. It is then fairly easy to lift the case back with about any snap-on case opener or case opener knife. After the case back is lifted, it can be fully opened by carefully driving a fingernail around the case back.
Junghans MEGA gold-plated on brown strap	Analog	W 608	Toshiba CR2016		Most annoyingly I managed to leave some light scratches on the case back. My favorite Bergeon 4755 had no change to enter the too small groove. The A&F case opener also slipped. Then I remembered that I had one of these most practical MKS Openers and this one did the job with ease!
SEIKO Criteria Slide Rule SNA299P1	Analog	Seiko 7T62 (Alarm Chronograph)	SEIKO SR927W	Renata R395	Case does not fit into Bergeon 5700Z fast sledge. Turning it 90 degrees and being careful not to scratch the bracelet was the best option. BATTERY LIFE OF 5 YEARS IS PRETTY AMAZING
BRAVUS Baretta	Analog	ETA 251.272, 22 Jewels	R394	SR936SW	Very easy to open. 4 screws, screwed caseback. Opening bracelet required
ROTARY Quartz Pocketwatch	Analog	ESA 960.111	R390	SR1130SW
Casio Front Jog Key	Digital with analog Jog stick	Caliber 2149	CR2016		One has to open the bracelet to get conveniently close to the spring bars in the case attachment. Battery was running for an amazing 8 years and 4 months
Traser Yellow Dial Model 3105S	Analog	Ronda Swiss EOL (end of life indication)	R395	SR927SW
Casio Multilingual Data Bank DB-37H	Digital	Casio Cal. 2524	CR2025
Adidas Alarm Chrono	Analog-Digital	AD 016A	VARTA V392 and Sony SR621SW		All blue plastic on the bezel, crown and the band had to be removed. The plastic turned brittle.

Reya's Quartz Watches
Watch	Type	Movement	Battery	Alternative	Opening and setting hints
Pingu Watch Aluminium with moving eyes	Analog	ETA, 118 parts	R377	SR626SW
Buttercup push-button watch, red	Digital	???	???	???
Disney SEA Tokyo	Analog	???	???	???
Hello Kitty Flip-Open, pink	Digital	???	???	???
MashiMaro pink	Digital	???	???	???
Taz Looney Tunes	Analog	ETA, Swiss part, Chinese Movement	R377	SR626SW
Lily-G Protector white, pink	Analog	Time Module Inc. (TMI) PC21S	R377	SR626SW
Winnie the Pooh	Analog	Time Module Inc. (TMI) PC21S	R377	SR626SW
Small Hello Kitty Flip Open black strap	Analog	Time Module Inc. smaller movt.	R319	SR527SW
Teletubbies	Analog	Time Module Inc.	R377	SR626SW
Minnie Disney (really bad quality)	Digital	WT	R392	SR/LR41
Winnie the Pooh Flip-Open	Digital	AA-52911A	R392 x 2	SR/LR41
Flik-Flak pink (Easter 2002 Zurich)	Analog	ETA	R377	SR626SW
Power Puff Girls with 3 color blinking LEDs	Digital	SB-2C	R392 x 2	G3-A CNB
Acapulco, steel, orange face and strap	Analog	ISA K63 Japan	R364	SR621W

Kritaya's Quartz Watches
Watch	Type	Movement	Battery	Alternative	Opening and setting hints
IWC DaVinci MechaQuartz Ladies Chronograph	MechaQuartz	IWC Caliber 631 (JLC Caliber 631)	R397	SR726SW	Open with A&F case opener knife. Horotec Case Crab does not work because of chrono pushers
Bertolucci Pulchra (greek for beauty)	Analog	ETA 956.112 7 Jewels	R364	SR621W	Remove spring bar at clasp first. Then the watch back opens relatively easy with A&F opener knife at 9 o'clock. There is also a tiny groove at 3 o'clock. Most likely a smart way to allow the case back to tilt open without touching the case at one point only.
Michel Jordi Longhorn 10 Micron gold-plated on brown leather strap (Wild West styled watch, not on site)	Analog	ETA 956.112 7 Jewels	R364	SR621W	Too difficult to open for me. Watch parts shop staff open with a Chinese knife with no visible effort. Unbelievable! Read more> Second opening: Used Horotec Case Crab to open. Still the case back is definitely too tight sitting. Attached case back with 3M tape to avoid another opening "drama"
Swatch Skin Orange	Analog	ETA Quartz	R317	SR516SW
Swatch Skin Transparent	Analog	ETA Quartz	R317	SR516SW
Casio Wristcommander II	Digital	Casio Quartz	CR2032
Pop Swatch Light Blue	Analog	ETA Quartz	R329	SR730SW
Swatch Chrono Mid-Size	Analog	ETA Quartz	R394	SR936SW
LEGO Watch	Analog	TMI Module	SR626SW
Swatch Irony Mid-Size Chronograph	Analog		R394	SR936SW
Swatch 700 Year CH Celebration, Felice Varin, black with red stripe	Analog		R390	SR1130SW
Swatch Chrono with star like gold pattern on dial and cream leather strap	Analog		R394	SR936SW
Swatch MusiCall	Analog		R390	SR1130SW
Swatch Valentine	Analog		R390	SR1130SW
ZURICH Insurance Promo watch blue green (sticky band!)	Analog		R377	SR626SW
Swatch gold-plated Mid-Size Irony	Analog		R329	SR730SW
Swatch Chrono with red blue Keith Haring pattern on band	Analog		R394	SR936SW
Swatch with yellow green Neon snap band	Analog		R390	SR1130SW
Swatch Irony Aluminum Case silver dial black band	Analog		R394	SR936SW
Swatch with funny Numerals (Octopus for 8 etc.) silver face and band	Analog		R390	SR1130SW
Swatch Skin with Metal Racing style bracelet	Analog		R317	SR516SW
Swatch World Time with Backlight	Analog		R389
Swatch STREPP Astronaut set with 3 dresses	Analog		R390	SR1130SW
2 Swatch Love & Nature (designed by Thai Princess)	Analog		R390	SR1130SW
Swatch Club ACCESS Watch "Lucky 7"	Analog		R390	SR1130SW
TAG Heuer Quartz Diver 300 m	Analog	ETA 955.114, 7 Jewels	R377	SR626SW	Use JAXA opener, the Bergeon 5700 bits are too big for the notches on the case back Tritium reacted with inner crystal and dial paint and created a really foggy layer on the inside of the crsytal!
Baby G with Dark Green Blue Velcro strap and dark purple display	Analog		LR1120 and SR621W
Swissair Promo Watch by Prestige Time Co. Hong Kong	Analog	China Made movement, Swiss Battery!	ISA395
Michel Jordi Ethno Watch with Swiss flag on back and crown, black leather strap	Analog	ETA 956.112, 7 Jewels	R364	SR621W	USE HOROTEC Case Crab, Michel Jordi watches pretty tough to open but on the other hand provide good water resistance.
TabooTaboo made in France, Basic, with 5 1/4 inch Floppy on dial	Analog	Ronda Quartz	R364	SR621W
BoogieBoogie Diver and fish on dial, flex band	Analog	TMI Module	R377	SR626SW
Thai Airways watch, Ladies' Size with Thai Numerals, white	Analog	ETA 400.111	R377	SR626SW
Ellesse Diver's 200 m Stainless Steel	Analog	ETA 956.112, 7 Jewels	R364	SR621W
London Tourist watch	Analog	TMI	SR626SW
Lapponia Silver watch Helsinki	Analog		R364	SR621W
Orion Triple Date Moonphase Quartz	Analog	Ronda	R377	SR626SW
Bucherer Quartz 30 min Chronograph	Analog	ETA 256.241 (very nice!) 10 Jewels	R364	SR621W	Very nice movement, also surprised to find pearlage decoration on inner case back! Compliment to Bucherer's selection
Phatra Insurance Promo watch	Analog	TMI Singapore	R377	SR626SW
Mondaine Railway Pocket Watch	Analog	Ronda Quartz	R364	SR621W
Patek Philippe 24	Analog	Patek E15	R321	SR616SW
Eterna Royal Quartz KonTiki Nr. 069	Analog	ESA 905.112	R384		Bergeon opener AND PAPER on case back to rest heel of tool!
Michel Jordi Ethno 10 micron gold-plated with stainless steel bracelet (not on site)	Analog	ETA 956.112, 7 Jewels	R364	SR621W
MontBlanc Quartz all stainless steel	Analog	ETA 976.001	R321	SR616SW	Leave the bracelet attached at 12 o'clock (need this part of the bracelet as a "grip") and open the screw at the solid end-link at 6 o'clock. Then used the modified Victorinox knife and rest it on the end-link at 6 and lift the case back open with a quick and firm motion
Christian Dior	Analog	ETA 280.002 5 Jewels	R321	SR616SW	Leave the bracelet attached at 12 o'clock (need this part of the bracelet as a "grip"). Unscrew the bracelet at 6 o'clock. Rest the modified screw driver/nail file blade of the modified mini Victorinox on the case, press it into the groove and quickly twist it upward.
Maurice Lacroix Intuition	Analog	ETA 280.002 5 Jewels	R321	SR616SW	Screwed case back, a sheer pleasure to open!
Philippe Charriol	Analog	ETA 256.111 9 Jewels	R315	SR716SW	Not really difficult to open, but hard to close by hand. Using a case press closes it easily