WS 22: Servicing a SEIKO 7005
including replacing the balance
Foreword
I had found this watch on the Jatujak market
(Bangkok's biggest weekend flea market) on August 12th 2002. Almost exactly three years later, I finally
found the time and courage :) to clean it. This time without my watch tutor Rob
B. OK, I had to call Rob twice. First on how to get some information on how to
take the balance off. And again on how to open the main barrel. Please find
Rob's great article about the
"Seiko Workhorse" where he describes an overhaul and features of the SEIKO
Caliber 7005 and also compares it to the 7009 and 7S26 and 7S36 calibers.
Here is the link to the story of that watch hunting day at Jatujak
More pictures
of the watch on an original SEIKO vintage bracelet are here
Reto Castellazzi, Bangkok, August 22nd
(cleaning), 23rd (spring work) and 25th (writing) 2005
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Click
here to start the tour or click on any thumbnail >>>
The Start |
Open case and Hairspring Detail
(2 pictures) |
Rotor removed |
Magic Lever explained |
Dial Side |
 |
The Balance |
Balance Wheel disconnected |
 |
Barrel and Automatic Winding System (upside down) |
Lever Fork (upside down) |
Open Mainspring Barrel |
Cleaning Basket (Tea filters) |
Small Parts |
Big Parts |
The Ultrasonic Cleansing Machine (3 pictures) |
Rinsing (2 pictures) |
 |
Did the Hairspring return to its perfect curvature after the bath? |
Old and new Hairspring |
The Mainspring |
The last Hurdle! A broken Spring Bar Pin in one of the Lug Holes! |
The End |
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