Thank for the write up, Nicolas....
By: watchme : September 29th, 2018-08:17
Walt Odets article in the timezone "Horologium," goes a bit more in-depth, and they compliment each other, nicely. Since the 839 and subsequent movements are based, originally, on the VC 1003/AP 2003, with an a change to the click spring, I think the MUT ...