This Seiko was sent to me for a service by Simon from Canada. There are two quite unusual features: the red 24 hour hand, and the fact that you can’t manually wind the watch. Only the auto winder winds it. The crown sets the timezone ring when not pulled out, and sets the date when pulled out one stop, and the time when fully pulled out.
Oh dear – looks like someone is spitting on the screen of the timegrapher. Something is wrong here
Auto winder removed
The bronze lever on the left at 10 o’clock is the stopper for the hacking second
The main spring barrel will need a good clean
Watch taken apart – ready for cleaning
Oiling as I go along
This explains the horrible image on the timegrapher
After de-magnetizing, the hairspring is still not quite right. I reshape the dog’s leg a bit, and voila, this should do the trick
Now that’s better. As adjusting the beat error is super-tricky (you can’t reach the collet from the outside, but you have to take out the balance every time), I stop at 0.9 ms. That’s pretty good, and I probably won’t get much closer. The graph looks so much better than at the start, so I’m very happy with this
I put the auto winder back on and close the case with a new gasket – job done.