I wwould like some help on dating a wittnauer watch. info on cover reads in this layout... 2139 Wittnauer New York Geneva Montreal 10 K goldfilled 8740523 Between the 10 and K, is a stamp that appears to have a C with an o in the center. Any help would be welcome.
Unfortunately, I am not aware of any published production tables for Wittnauer. So this is a tough one...if you have a picture, send it to me and I could guess but accurate dating will be tough.