Keystone Watch Case Co. Case Trademark
![Philadelphia Watch Case Co.
Victory
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-145.jpg)
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
Philadelphia Watch Case Co.Victory
[Crown]
Trademark Issued:
January 1, 1901Traits:
10 Yr. Gold-FilledGold-Filled