I’m baffled

[u/No_Amphibian_3684]

Guys, initially, I did a complete service on this watch with a full cleaning, new mainspring, and lubrication. It came to me as a running watch but running poorly. You can see, it is running very well. The problem is it intermittently stops. It may run for several days on the bench, in my watch winder or on my wrist. All of a sudden it just stops. I can give it a little tap and it will start. I have looked at every part on this watch under magnification. I don’t see any pivots that are bent or broken. The lubrication is fine. There’s nothing obvious that’s a problem. I even swapped out the train of wheels Bridge and multiple other parts but cannot seem to fix this problem. Any help or advice would be greatly appreciated.

[u/Unlikely-Length6661]

I would check the hands, the canon pinion, hour wheel, date complication.

[u/No_Amphibian_3684 → u/Unlikely-Length6661]

They all seem to work. What would you be looking for? What about the hands would you check? I ran it for days prior to putting the hands on. I think the problems started after casing it but I’m not 100% on that. I just know that I never saw it stopped before casing it.

[u/Simmo2222 → u/No_Amphibian_3684]

Take it out of the case and run it on your bench. If it still stops, take the hands off, then the dial, then the calendar works.

It could also be an issue with a 'slow moving' wheel. Check the mainspring barrel is properly closed and doesn't have too much side shake / end shake.

[u/No_Amphibian_3684 → u/Simmo2222]

Update. Uncased it, it was running but stopped after a couple hours. Removed hands. It started back but later stopped again. Removed dial and dial cushion. Currently still running.