My 8 Seiko Kinetics with Movement and Serial numbers and capacitor information...

After reading the website of the Czech (sorry forgot his name) gentleman and learning that Movements 5M42, 5M43 and 5M22 contain those faulty capacitors (see also my post below for a discussion of those capacitors) I went to my collection and noted all 8 Kinetic's serial numbers and movement numbers :-) You made my Saturday afternoon busier then planned... :-)

First the 5 Seiko Kinetics without problems:

First Kinetic Diver, SN 491325, produced in 1994, September (9), Movement 5M23-6B88, capacitor OK


Kinetic Diver SN 671330, prod 1996, July, Movement 5M42-OC8W, hm, this watch already shows that the movement number before the dash is not enough to determine whether the watch contains a defect capacitor or not


First Arctura Rubber Kinetic, SN 730348, Movement 5M42-OH28, hm, the second watch with an 5M42, that runs perfectly alright

 First widely marketed Kinetic model, was used for years in adverstising, SN 434734, Movement 5M22-6C3B, hm, again, also the 5M22 obviously does not mean that your capacitor is faulty because this one runs very well too


 Kinetic with Luminous World Map, SN 493840, 5M22-6C38 yet another 5M22 which runs perfectly

The 3 Kinetics with faulty capacitors that store energy not as well, but the watches still run normally when worn frequently.
I made a comparison test in January 2005 using the first widely marketed Kinetic and the three watches below. I swayed all watches until there was a power reserve of 20 seconds corresponding to 48 hours. I started the comparison on Saturday 29th 2005 at 14:00 and then checked on Sunday morning. The 5M22 (see above) was still ticking happily, the three watches below stopped at 05:20, 09:15 and 07:30. They ran for about 17 hours. I also noticed that when I moved the watches back to the safe, the minimal motion carrying them a couple of meters, started all of them. I had exchanged all 3 capacitors of the watches below on October 8th 2006. You will need the kits SEIKO 30235MZ that contain the capacitors, a plate and the insulator and it is about as difficult as to exchange a watch battery. Here are instructions on how to do it: How to change the Capacitor of a SEIKO 5M42 Kinetic

 Ti Kinetic SN 542752, prod 1995, April, Movement 5M42-OA28, capacitor not OK

 Ti 2tone Kinetic SN 558496, prod 1995, May, Movement 5M42-OA28, capacitor not OK

Finally a valuable hint, all we can say so far is, that 5M42-OA28 is likely to have faulty capacitors and that those faulty capacitors were used during April/May 1995
Interesting also that the original old capacitors were made by SEIKO Instruments Incorporation (SII) and bore the number SL920. The replacement capacitors in the kit 30235MZ purchased in 2006 contained Maxell TC920S Li-ion capacitors

 Kinetic Day Date SN 730130, prod 1997, March, Movement 5M43-OC98

Conclusion: One always has to check things one finds on the net. If I did not thoroughly check all my Kinetics (I left out the AGS and the AutoRelay because those are certainly OK), I would have just believed that 5M22 and 5M42 and 5M43 had faulty capacitors and probably used that wrong information in answers here and then the misinformation would have further spread. All we can really say is that if you have a 5M42-OA28, you are most likely having reduced energy storage. If you have 5M43-OC98, you are going to have problems too most likely. And still, even those watches with faulty capacitors, I can wear, they keep perfect time. They might run out of power reserve during the first couple of hours, but I noticed that after a couple of days, they keep running perfectly. It seems that those faulty capacitors simply have a maybe 70% reduced capacity to store energy.

Please follow these instructions -
How to change the Capacitor of a SEIKO 5M42 Kinetic - the exchange of the capacitors in the kit SEIKO 30235MZ is really not much more difficult then to exchange a watch battery and also does not take much more time. You will need a case opener, a ca. 1.2 to 1.4 mm screw driver to unscrew the rotor and a 1 mm screwdriver to unscrew the 2 screws on the capacitor plate. Plus plastic tweezers to handle the capacitors. And this is already all there is to it. The whole work should maybe take 10 to 15 minutes depending on what additional work (cleaning the case and case back, greasing/replacing the gasket rings) you are doing.

The group shot of the three watches after ca. 24 hours (replacement date, Oct. 8th, 2006)

I have been watching the three Kinetics (which had been laying on my workpad and not been moved nor worn) for months now. The replacement date was October 8th 2006 and today, on January 12th 2007, the watches are still running. I start to believe that the TC920 Li-Ion replacement capacitors are like a rechargeable battery it seems. The TC920 Li-Ion battery/capacitor with the factory charge keeps the watches going for 7 months (last update June 13th, 2007)

Go to Seiko I Table
Go to Seiko II Table

Go to WS 26 Seiko 5M42-OL68 R2 Capacitor Change