Keystone Watch Case Co. Case Trademark
![C.W.C.Co
Trade Mark.
[Crescent and Star]
Century (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-67.jpg)
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
C.W.C.CoTrade Mark.
[Crescent and Star]
Century
Trade Mark.
[Crescent and Star]
Century
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