Hi, I'm new here so apologies if this should go somewhere else, but curious if anyone has a take.

I just bought a Blancpain Leman Flyback (prob from early 2000's) in LN condition from a generally reputable dealer. It seemed to be running a little weird. When I got it on the timegrapher it seemed to have some issues with amplitude. On the wrist, it was gaining even more time (2min+ per day- maybe knocking or something?).

I called the dealer (who has an in-house watchmaker/repair service)...

Acceptible Accuracy for Luxury Used Watch?