Pocket Watch Database

Keystone Watch Case Co. Boss Scale Crown 14K/25YR
Watch Case Marking for Keystone Watch Case Co. Boss Scale Crown 14K/25YR: Keystone
Watch Case Co.
[Keystone Block]
[Crown and Scales]
J.Boss
25 Years

Note: Case manufacturers modified markings over time. As a result, the image above is simply a representation of one particular marking used by the company. Your case marking may differ based on the production era and other parameters.

Boss Scale Crown 14K/25YR

Database ID:PWDB-5
Case Grade:Boss Scale Crown 14K/25YR
Material:Gold-Filled
Gold Content:14K
Guarantee:25-Year
Introduced:January 1898
Note:Keystone added an additional five years to the guarantees starting January 1898, leading to the 14K/25YR grade. "Solid Gold Bow, Crown, Joints, and Thumb Piece" [1913FD]
Trademark:82993
Trademark Issued:Aug 8, 1911
In Use Since:c.1875
Patents:#23820
Marking Variants:
(Not Intended to be Comprehensive)
Original Papers:

Image Provided by The Keystone



Image Provided by The Keystone



Image Provided by The Keystone


Catalog Sources: 1877DFC 1878CYC 1880GHR 1880JAB 1880NHW 1882SFM 1883GHR 1883UNK 1884LSS 1885OY 1886HMS 1886RA 1887BHIA 1887LAM 1888BA 1888OY 1889BAM 1889EVR 1890AP 1890BA 1890CHK 1890JC05 1890OY 1890SFM 1891RR 1891SAC 1892ACR 1892BAC 1892CPS 1892WES 1893BFNA 1893BHIA 1893MCE 1893SAC 1894BA 1894BATM 1894NRC 1895OY 1895SFM 1896MF 1896OY 1897BB 1898MLMF 1899ACB 1899BHIA 1899SAC 1900BA 1900BHIA 1900LMC 1900NHW 1901BAC 1901OY 1902ACB 1902BATM 1902BB 1902MF 1903ACB 1903BAC 1903FDW 1903N76 1903ON 1904ACB 1904BA 1904LB 1904PWC 1905ACB 1905BAC 1905DH 1905FNCS 1905ON 1906ON 1906SRC 1907ACB 1907JVF 1907NAC 1907NBC 1907SFM 1908ACB 1909BAC 1910ACB 1911NG 1911OY 1911WJJ 1912COC 1912HA 1912NG 1912SFM 1912WJJ 1913FDW 1914ELD 1915ACB 1915ON 1915PWE 1916LCM 1917BA 1923CBN 1923ON 1925ASJ 1925CPS 1928ON 1932ON 1942WAG
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Information provided by users may contain inaccuracies. Dials, cases, and hands displayed may not be original to the watch.

0 Admirations
Serial No.: #219417
Manufacturer:Hamilton
Grade:925
Size:18s
Model:2
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1903
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:Braveerik Profile Image Braveerik
4 Admirations
Serial No.: #7056561
Manufacturer:Elgin
Grade:159
Size:16s
Model:7
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1898
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:astralmind Profile Image astralmind
2 Admirations
Serial No.: #331555
Manufacturer:Hamilton
Grade:971
Size:16s
Model:1
Jewels:21j
Setting:Pendant
Finish:Nickel
Est. Date:1905
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:firebirdjeff02 Profile Image firebirdjeff02
2 Admirations
Serial No.: #804982
Manufacturer:Hamilton
Grade:974
Size:16s
Model:1
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1911
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:firebirdjeff02 Profile Image firebirdjeff02
5 Admirations
Serial No.: #4117092
Manufacturer:Illinois
Grade:806
Size:16s
Model:9
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1922
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:wmike565 Profile Image wmike565
2 Admirations
Serial No.: #8551049
Manufacturer:Elgin
Grade:233
Size:12s
Model:2
Jewels:15j
Setting:Pendant
Finish:Nickel
Est. Date:1900
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:reinsurer Profile Image reinsurer
15 Admirations
Serial No.: #16169845
Manufacturer:Waltham
Grade:Crescent St.
Size:18s
Model:1892
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1907
Case Model:J. Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:ChrisG Profile Image ChrisG
12 Admirations
Serial No.: #1042263
Manufacturer:Hampden
Grade:No. 108 D (in Flag)
Size:16s
Model:2
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1897
Case Model:J Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:ChrisG Profile Image ChrisG
7 Admirations
Serial No.: #12016742
Manufacturer:Elgin
Grade:241
Size:16s
Model:6
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1906
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:Laffite Profile Image Laffite
10 Admirations
Serial No.: #2024129
Manufacturer:Hampden
Grade:No. 105
Size:16s
Model:4
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1905
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:ChrisG Profile Image ChrisG
5 Admirations
Serial No.: #3915219
Manufacturer:Illinois
Grade:706
Size:16s
Model:8
Jewels:19j
Setting:Lever
Finish:Nickel
Est. Date:1921
Case Model:J Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Added By:ChrisG Profile Image ChrisG
9 Admirations
Serial No.: #1532770
Manufacturer:Hamilton
Grade:992
Size:16s
Model:2
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1920
Case Model:Case Model #5
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:44149
Added By:kansasbeals Profile Image kansasbeals
5 Admirations
Serial No.: #23974
Manufacturer:Aurora Watch Co.
Grade:
Size:18s
Model:
Jewels:15j
Setting:Lever
Finish:Gilt
Est. Date:1885
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:87022
Added By:Blicquer Profile Image Blicquer
4 Admirations
Serial No.: #126989
Manufacturer:Rockford
Grade:Unknown
Size:18s
Model:5
Jewels:9j
Setting:Lever
Finish:Gilt
Est. Date:1881
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:129019
Added By:pocketwatch101 Profile Image pocketwatch101
4 Admirations
Serial No.: #2034763
Manufacturer:Waltham
Grade:P.S. Bartlett
Size:18s
Model:1877
Jewels:15j
Setting:Lever
Finish:Nickel
Est. Date:July 1883 - October 1883
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:167747
Added By:Rickglick1 Profile Image Rickglick1
Serial No.: #726214
Manufacturer:Illinois
Grade:131
Size:4s
Model:1
Jewels:11j
Setting:Lever
Finish:Gilt
Est. Date:1885
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:203182
Added By:JDPorter81 Profile Image JDPorter81
4 Admirations
Serial No.: #1864372
Manufacturer:Elgin
Grade:100
Size:18s
Model:6
Jewels:15j
Setting:Pendant
Finish:Gilt
Est. Date:1886
Case Model:J Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:215857
Added By:Rickglick1 Profile Image Rickglick1
2 Admirations
Serial No.: #3403689
Manufacturer:Elgin
Grade:95
Size:6s
Model:1
Jewels:7j
Setting:Lever
Finish:Gilt
Est. Date:1889
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:322697
Added By:technomage Profile Image technomage
4 Admirations
Serial No.: #1188765
Manufacturer:E. Howard Watch Co. (Keystone)
Grade:Series 11
Size:16s
Model:E
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1912
Case Model:E. Howard Watch Co.
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:1037324
Added By:rings3 Profile Image rings3
2 Admirations
Serial No.: #1325421
Manufacturer:E. Howard Watch Co. (Keystone)
Grade:Series 7
Size:12s
Model:1912
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1917
Case Model:Keystone Extra - E. Howard Watch Co. - Boston
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:1056902
Added By:rnfwatch Profile Image rnfwatch