This Seamaster uses the calibre 1120 movement, which is an ETA2892.2. A great performer, and a reliable movement.
To get to the bottom of the problem, I don’t really have a choice but to do a full service first, as I won’t be able to exclude components bit by bit from my quest to find out what’s wrong…
The Seamaster has an antimagentic dust cover on the back, and we’ll get to that later.
Barrel bridge with click. The basic movement is back together. Jon asked me for a video of the movement ticking, so here it is. Jon pointed out that in the background, U2 is playing “I still haven’t found what I’m looking for”. How fitting 😉
And I test if the watch is waterproof – it is indeed.
Now comes the painful part – after having wound the watch fully, I put it in the autowinder, and it stops duly after 46 hours. That means the auto winder still isn’t working.
After scratching my head for a considerable amount of time, I take the dust cover out, just because I can’t think of anything else causing the problem. With the movement almost completely unwound, it does 24 hours and is still happily ticking when I take it out. So I have found my problem!
Now I take my case press and every so slightly press out the dust cover, and put it back on.
7 days in the autowinder later, and I’m happy 😉