Dear Forum, I made the plunge for a recently serviced 3919 which arrived yesterday and is beautiful. While winding the 215 movement, I noticed that it didn't take long to start feeling stiff and coming to a stop. To not force an avoidable broken mainsprin...
The watch was half empty about an hour ago and it got around 20 winds. If I should guess, I would say around 50. But if it is important, I can let it empty and try on Friday evening. Best, Kari