I have cleaned and oiled a Favre Leuba cal 253 movement and it stops and starts at random intervals. It start running if I tap it or shake it.
If i leave the watch on my desk and do not touch it, it runs for over 30 hours--and keeps good time.
I have worked on several of these movements with no problems. What should I look for when I take it apart that could be the cause of the intermittent start/stopping?
I'm assuming that something is amiss with the balance cock assembly?? because when the watch is stationary it doesn't stop until the main spring winds down.
Help!, Thanks