Another one of Constantine’s watches he sent from NY – an Omega Seamaster with the 1020 calibre. This is a great movement beating at 8 bps / 28,800 bph. He sent it in as it hardly has any power reserve when using the auto-winder, but it’s fine when hand-wound. Probably something a service will sort out.
To start off with, let’s put the watch on the timegrapher.
Nice and straight lines, a bit too fast, and the amplitude is a bit low. But this looks good.
The watch back snaps off.
Looks like it’s been a while since the last service. No service marks on the watch back, but there are other people than me that don’t like to scratch their customers’ watches 😉
I remove the winding stem, and take the movement out of the case. Now I remove the hands and the dial.
The day and date rings on the bottom plate. As usual, the days of the week appear twice, so that the wheel doesn’t have to be moved 1/7 of a turn every day, but only 1/14.
The date changer is actually made from plastic. Nothing wrong with that, it will make the day change sound less clanky.
The winding and setting mechanism is very dirty, and parts are oxidized. Looks to me like water got in past the crown and down the winding stem.
Definitely no waste of time to give this watch a service.
Now I turn the movement around to the top plate.
The auto-winder bridge and assembly.
Onwards and upwards ….
With the wheel bridge removed, you can see that the mainspring barrel drives the second wheel (there is no centre wheel), and the third wheel drives on one side the second hand arbor, and through the plate, on the bottom plate, the cannon pinion which drives the motion work.
Balance wheel assembly.
Just the pallet fork left.
The pallet fork needs some cleaning as well.
The worst damage is on the pull-out piece, but I’ll probably manage to clean it up.
The hairspring looks very good, and so does the balance wheel.
The mainspring doesn’t look too bad.
Ready for cleaning ….
The story continues here.