Pocket Watch Database

Keystone Watch Case Co. Boss Scale 10K/15YR
Watch Case Marking for Keystone Watch Case Co. Boss Scale 10K/15YR: [Scales]

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 10K/15YR

Database ID:PWDB-37
Case Grade:Boss Scale 10K/15YR
Material:Gold-Filled
Gold Content:10K
Guarantee:15-Year
Introduced:July 1889
Discontinued:January 1898
Note:"Solid Gold Bows and Thumb Pieces" [1895SFM]. The 1895SFM catalog indicates the 6-Size is guranteed to only 10 years. However, this is likely an error since the 10K was guranteed for 15 years during this era.
Patents:#23820
Original Papers:

Image Provided by Jones & Horan


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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2 Admirations
Serial No.: #27202203
Manufacturer:Elgin
Grade:478
Size:16s
Model:15
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1925
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Guarantee:20
Added By:wmike565 Profile Image wmike565
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.: #24880025
Manufacturer:Elgin
Grade:455
Size:16s
Model:15
Jewels:19j
Setting:Lever
Finish:Nickel
Est. Date:1922
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Added By:wmike565 Profile Image wmike565
Serial No.: #2510390
Manufacturer:Hamilton
Grade:992
Size:16s
Model:2
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1928
Case Model:J.BOSS
Case Material:Goldfilled
Gold Karat:10
Case Serial:49352
Added By:Steve3bs Profile Image Steve3bs
2 Admirations
Serial No.: #34573348
Manufacturer:Elgin
Grade:495
Size:12s
Model:4
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1934
Case Model:J.boss
Case Material:Goldfilled
Gold Karat:10
Case Serial:59002
Added By:naonarut Profile Image naonarut
11 Admirations
Serial No.: #34133303
Manufacturer:Elgin
Grade:506
Size:16s
Model:15
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1933
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Guarantee:10
Case Serial:81324
Added By:Mobilaero Profile Image Mobilaero
2 Admirations
Serial No.: #31208708
Manufacturer:Elgin
Grade:478
Size:16s
Model:15
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1928
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Case Serial:82082
Added By:todix144 Profile Image todix144
5 Admirations
Serial No.: #1414106
Manufacturer:Hamilton
Grade:941
Size:18s
Model:2
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1919
Case Model:Boss Scale 10k/15yr
Case Material:Goldfilled
Gold Karat:10
Guarantee:15
Case Serial:1495076
Added By:garydurie Profile Image garydurie
16 Admirations
Serial No.: #619877
Manufacturer:Hamilton
Grade:927
Size:18s
Model:2
Jewels:17j
Setting:Lever
Finish:Gilt
Est. Date:1909
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Case Serial:2320810
Added By:Mobilaero Profile Image Mobilaero
5 Admirations
Serial No.: #412232
Manufacturer:Rockford
Grade:86
Size:18s
Model:7
Jewels:15j
Setting:Lever
Finish:Nickel
Est. Date:1893
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:20
Case Serial:2352278
Added By:MichaelB Profile Image MichaelB
50 Admirations
Serial No.: #8401426
Manufacturer:Elgin
Grade:214
Size:18s
Model:8
Jewels:23j
Setting:Lever
Finish:Nickel
Est. Date:1900
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:20
Case Serial:2623316
Added By:Mobilaero Profile Image Mobilaero
6 Admirations
Serial No.: #1204548
Manufacturer:Hampden
Grade:New Railway
Size:18s
Model:3
Jewels:23j
Setting:Lever
Finish:Two-Tone
Est. Date:1898
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:15
Case Serial:2624542
Added By:redjms Profile Image redjms
2 Admirations
Serial No.: #6942818
Manufacturer:Elgin
Grade:175
Size:6s
Model:2
Jewels:7j
Setting:Pendant
Finish:Half-Nickel
Est. Date:1897
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:15
Case Serial:2703445
Added By:todix144 Profile Image todix144
5 Admirations
Serial No.: #1236709
Manufacturer:Hampden
Grade:Dueber Grand
Size:18s
Model:4
Jewels:17j
Setting:Lever
Finish:Gold Flashed
Est. Date:1898
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:2888297
Added By:redjms Profile Image redjms
2 Admirations
Serial No.: #2603254
Manufacturer:Hamilton
Grade:992e
Size:16s
Model:2
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1935
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Case Serial:4328124
Added By:todix144 Profile Image todix144
2 Admirations
Serial No.: #10992069
Manufacturer:Waltham
Grade:No. 620
Size:16s
Model:1899
Jewels:15j
Setting:Pendant
Finish:Nickel
Est. Date:1901
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:20
Case Serial:4463359
Added By:todix144 Profile Image todix144
2 Admirations
Serial No.: #6387466
Manufacturer:Elgin
Grade:117
Size:6s
Model:2
Jewels:7j
Setting:Pendant
Finish:Gilt
Est. Date:1896
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:20
Case Serial:5002063
Added By:JenZo82 Profile Image JenZo82
6 Admirations
Serial No.: #2118887
Manufacturer:Elgin
Grade:44
Size:18s
Model:5
Jewels:15j or 17j
Setting:Pendant
Finish:Nickel
Est. Date:1887
Case Model:J.Boss
Case Material:Goldfilled
Case Serial:5146873
Added By:machinistrich Profile Image machinistrich
9 Admirations
Serial No.: #408377
Manufacturer:Hamilton
Grade:940
Size:18s
Model:1
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1903
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:20
Case Serial:5324777
Added By:MichaelB Profile Image MichaelB
2 Admirations
Serial No.: #1096377
Manufacturer:Hamilton
Grade:974
Size:16s
Model:2
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1914
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:5349590
Added By:OntarioLantern Profile Image OntarioLantern