When I started replacing the Capacitors (rechargeable batteries) in Seiko Kinetic watches 10 years ago the most difficult part for me was getting the darn case back off the watch.
I struggled and cursed and busted my knuckles and strained a thumb and lost those tiny tiny (and expensive) screws in the carpet and so on.
So I want to save others the same frustrations.
I have 2 ways now that I use to remove the screw-back case backs from Seiko Kinetics.
This is one method.
I will document the other method in a later post.
You will need:
A Nut appropriate for the size of your Seiko's case back
Krazy Glue or something similar
A wrench or some kind
1. You will clean the case back to remove oils and such that inhibit the Krazy Glue from making a firm seal
2. Glue the nut onto the case back
3. Let the glue set. I use baking soda to expedite that process.
4. Don't get impatient.
5. When the Krazy Glue has set just turn the nut with a wrench and
the case back will easily turn off.
6. Then simply soak the case back with the nut glued onto it in a capful
7. The acetone will dissolve the Krazy Glue and the nut will separate from the case back.
8. The case back is now free from the watch, and you have access to the inside of the watch to replace the Capacitor.
There are other methods touted all over the Internet.
Trust me, over the years I tried them all.
The biggest scam I think is the sticky rubber ball they sell.
You are supposed to be able to just buy that rubber ball and press it against the case back and turn it and the case back will come off.
Dozens of the Kinetics I have worked on are over 20 years old and have never been serviced, but have been worn daily and are simply horrible to work with.
The gaskets ("O-ring") is usually dried out and shrunken and adhesive.
There is grime and dirt and skin oils that have degenerated and more and more.
Don't waste money on a rubber ball.
I will post the other method soon.
Let me know if you have any questions about Seiko Kinetics.