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.
No dial washer present…
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.
Now the gear train goes in.
And the movement is ticking.
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….
Dial and hands go on.
And I can case the movement.
A new gasket for the case back.Final adjustment.
And into the autowinder for testing.