I've had this watch for a couple of years and it's consistently gained 20 seconds a day. Not bad, but today during a close inspection (yes, it took two years) I noticed the caseback wasn't seated flush against the case on one side, flush on one side, a small gap on on the other side. This watch has been under the faucet for cleaning and handwashing numerous times with no problems afterward so I'm not so sure there's a lot to worry about..
Well, until now....
Sooooo..... I've been wanting to try my hand at regulating a watch for some time. After seeing the gap I decided to give it a try on this watch and maybe see what's up with the caseback gap.
1. When I removed the caseback the gasket came off with the caseback and it's seated firmly at the base of the caseback threads. Usually when I see open watch case pics the gasket is resting in a channel in the back of the case. The gasket seems to be in good condition and uniformly shaped. Is finding it on the caseback threads normal?
2. If I remove the gasket and the caseback screws down flush then it must be the gasket causing the gap? If there is still a gap then it's the threads, correct? Since I doubt I can remove the gasket without damaging it... When I source a gasket, how do I express what size or whatever that I need? On second thought, I really don't want to remove the current gasket until I have a replacement in hand, whether I need it or not.
By the way, no manner of trying to determine if the threads were crossed worked for me. I could never find (feel) a defined starting point for the threads but the caseback threaded back on without a problem and really smoothly two times.
The best part is, I've taken the first step to move beyond only adjusting bracelets. It's taken quite a while to get up the nerve to open a watch.