Keystone Watch Case Co. Case Trademark
![415
Warranted
The K.W.C.Co.
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-38.jpg)
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
415Warranted
The K.W.C.Co.
[Keystone Logo]
Warranted
The K.W.C.Co.
[Keystone Logo]
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