Keystone Watch Case Co. Case Trademark
![Crescent
[Crescent and Moon] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-84.jpg)
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
Crescent[Crescent and Moon]
[Crescent and Moon]
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