Keystone Watch Case Co. Case Trademark
![[Crown and Scales] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-42.jpg)
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
[Crown and Scales]Trademark Issued:
August 8, 1911Traits:
Gold-Filled14K Gold-Filled
14K Gold-Filled