It’s been quite a while since I’ve done my last bumper, and this one comes from Sweden. It’s in very good condition for its age, and the dial has very few marks.
Some scratches on the movement, and it looks like it’s been serviced a couple of times, which isn’t a bad thing.
Looks like the dial was restored at one point – I don’t think I would have spotted that just looking at the front.
Time to take apart the movement.
The usual dirt, but all the parts are in good shape.
Into the cleaning machine.I got a whole load of Bergeon mainsprings for the bumper movement from Australia, as I couldn’t find any over here. I still have 11 left 😉
And into the barrel it goes – I have applied braking grease to the wall already.
1.3ms is fine for a collet-corrected beat error, and I will leave it at that. I have a good amplitude and good beat rate.
Now it’s time for the bottom plate.
The “hammer” for the auto-winding mechanism.
And a new dial washer for the hour wheel. Somebody scratched “20” next to the jewel….
Sweet!
Bumpers, and the RG versions are really special.
Omega lists this reference as a 351 or 354 caliber watch, however it seems that Omega used the 352RG movements instead of the 354 for chronometer certified models for a short period. This may be a good example of this.
Nice watch!
What would make me think the dial had been re-done is the way the chapter ring obscures the “Swiss Made” text. It looks good though 😉
I once broke an unbreakable mainspring; I was quietly rather pleased with myself…
I’m seeing my mainspring breaking in a whole new light now!