Location: Philadelphia, Riverside, New Jersey
Years of Operation: 1875-1956
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![Keystone
Watch Case Co
J. Boss
Guaranteed
25 Years
[Crown & Scale] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-2.jpg)
![Keystone
Watch Case Co
J. Boss
20 Years
[Scale] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-5.jpg)
![Keystone
Watch Case Co
J. Boss
14K
Gold Filled
[Crown & Scale] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-6.jpg)
![J.Boss 14K
Guaranteed
20 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-10.jpg)
![C
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-13.jpg)
![Philadelphia Watch Case Co.
Trade Mark
Sterling
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-141.jpg)
![Philadelphia Watch Case Co.
Trade Mark
Crown
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-142.jpg)
![Philadelphia Watch Case Co.
Trade Mark
Victory
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-143.jpg)
![Keystone
14K
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-144.jpg)
![Philadelphia Watch Case Co.
Victory
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-145.jpg)
![Philadelphia Watch Case Co.
Crown
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-146.jpg)
![Keystone
Watch Case
[Keystone Logo]
[Scales]
J Boss
14K
Gold Filled (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-147.jpg)
![Keystone
Watch Case
[Keystone Logo]
[Scales]
J Boss
10K
Gold Filled (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-148.jpg)
![B.W. Raymond
Model
Keystone
Watch Case
[Keystone Logo]
[Scales]
J Boss
10K
Gold Filled (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-149.jpg)
![[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-15.jpg)
![Trade Mark.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-150.jpg)
![Keystone
18K
Trade Mark
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-18.jpg)
![[Keystone Logo]
Warranted
18K
U.S. Assay (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-19.jpg)
![[Keystone Logo]
Warranted
18K
U.S. Assay (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-20.jpg)
![J Boss 14K
Guaranteed
25 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-21.jpg)
![J Boss 14K
Guaranteed
20 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-22.jpg)
![Keystone
Watch Case
[Keystone Logo]
C (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-23.jpg)
![J Boss 14K
Guaranteed
10 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-24.jpg)
![Keystone
Watch Case
[Keystone Logo]
Sterling (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-25.jpg)
![Sterling
Guaranteed
925 Fine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-26.jpg)
![Keystone
Watch Case
[Keystone Logo]
Coin (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-27.jpg)
![Coin
Guaranteed
900 Fine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-28.jpg)
![Keystone
Watch Case
[Keystone Logo]
Silveroid (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-29.jpg)
![Silveroid
Guaranteed
Genuine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-30.jpg)
![Keystone
18K
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-31.jpg)
![750
Warranted
The K.W.C.Co.
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-32.jpg)
![18K
Warranted
U.S. Assay
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-33.jpg)
![Keystone
14K
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-34.jpg)
![585
Warranted
The K.W.C.Co.
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-35.jpg)
![14K
Warranted
U.S. Assay
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-36.jpg)
![Keystone
10K
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-37.jpg)
![415
Warranted
The K.W.C.Co.
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-38.jpg)
![10K
Warranted
U.S. Assay
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-39.jpg)
![Keystone
Watch Case
[Keystone Logo]
Extra (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-40.jpg)
![Extra
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-41.jpg)
![[Crown and Scales] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-42.jpg)
![J Boss 14K
Guaranteed
25 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-43.jpg)
![J Boss 14K
Guaranteed
20 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-44.jpg)
![[Scales] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-45.jpg)
![J Boss
Guaranteed
20 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-46.jpg)
![J Boss
Guaranteed
15 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-47.jpg)
![J Boss
Guaranteed
10 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-49.jpg)
![J Boss
Guaranteed
5 Years
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-50.jpg)
![Keystone
Watch Case
[Keystone Logo]
Sterling (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-51.jpg)
![Sterling
Guaranteed
925 Fine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-52.jpg)
![Keystone
Watch Case
[Keystone Logo]
Coin (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-53.jpg)
![Coin
Guaranteed
900 Fine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-54.jpg)
![Keystone
Watch Case
[Keystone Logo]
Silveroid (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-55.jpg)
![Silveroid
Guaranteed
Genuine
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-56.jpg)
![Trade Mark.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-58.jpg)
![C.W.C.Co
Trade Mark.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-59.jpg)
![C.W.C.Co
Trade Mark.
[Crescent and Star]
Planet (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-60.jpg)
![Patented
C.W.C.Co.
Trade Mark.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-61.jpg)
![A.W.W.Co.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-62.jpg)
![C.W.C.Co
Trade Mark.
[Crescent and Star]
Pioneer (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-66.jpg)
![C.W.C.Co
Trade Mark.
[Crescent and Star]
Century (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-67.jpg)
![Star
And
Crescent
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-68.jpg)
![Crescent
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-69.jpg)
![Keystone
14K
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-7.jpg)
![Jas. Boss.
Filled Cases
Trade Mark
[Keystone Logo]
Standard of the World (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-70.jpg)
![[Indian] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-75.jpg)
![[Winged Wheel] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-76.jpg)
![[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-77.jpg)
![[Bee Hive]
Guaranteed
5-Years (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-78.jpg)
![Philadelphia
Watch Case Co.
Trade Mark.
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-79.jpg)
![Warranted
14 K.
U.S.A.
[Keystone Logo] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-8.jpg)
![Crown
[Crown] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-80.jpg)
![[Bee Hive] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-81.jpg)
![[Lion]
Lion (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-83.jpg)
![Crescent
[Crescent and Moon] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-84.jpg)
![Star & Crescent
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-88.jpg)
![Keystone
Watch Case
[Keystone Logo]
[Crown and Scales] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-9.jpg)
![C.W.C.Co.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-90.jpg)
![[Arm and Hammer] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-91.jpg)
![A.W.W.Co.
[Crescent and Star] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-92.jpg)
![[Shield] (Keystone Watch Case Co.)](/assets/images/media/Trademark-KeystoneWatchCaseCo-151.jpg)