The movement jammed: the watch could not be switched properly into the winding position.
What was done
Drilled out the worn post on the mainplate, turned a new one from steel on the lathe and pressed it in. Then a full movement service.
Result
The watch works as it should again. The new post is smaller than the ball of a ballpoint pen.
How the work went
While disassembling the movement I found a serious problem: a badly worn post on the mainplate along which the stop-seconds lever moves.
Because of this small part the movement jammed, and the watch could not be switched properly into the winding position.
The old post had to be drilled out. I turned a new one from quality steel on the watchmaker’s lathe — it is smaller than the ball of an ordinary ballpoint pen — and pressed it into the mainplate.
Then a full movement service: cleaning, reassembly, lubrication and regulation.
The new post next to a ballpoint pen tipThe post on the mainplateThe movement taken apart for service
