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 1907OY 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.: #9006846
Manufacturer:Elgin
Grade:210
Size:16s
Model:6
Jewels:7j
Setting:Pendant
Finish:Nickel
Est. Date:1901
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:10
Guarantee:20
Case Serial:6674144
Added By:Tahoward82 Profile Image Tahoward82
2 Admirations
Serial No.: #11197965
Manufacturer:Elgin
Grade:320
Size:0s
Model:2
Jewels:7j
Setting:Pendant
Finish:Nickel
Est. Date:1905
Case Model:J.BOSS
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:6990180
Added By:BrucePainter Profile Image BrucePainter
4 Admirations
Serial No.: #16678439
Manufacturer:Elgin
Grade:376
Size:16s
Model:15
Jewels:23j
Setting:Lever
Finish:Nickel
Est. Date:1912
Case Model:J.BOSS
Case Material:Goldfilled
Gold Karat:14
Case Serial:7100961
Added By:Steve3bs Profile Image Steve3bs
2 Admirations
Serial No.: #12226042
Manufacturer:Waltham
Grade:No. 620
Size:16s
Model:1899
Jewels:15j
Setting:Pendant
Finish:Nickel
Est. Date:1903
Case Model:J.BOSS
Case Material:Goldfilled
Guarantee:25
Case Serial:7365151
Added By:twohands Profile Image twohands
3 Admirations
Serial No.: #12348845
Manufacturer:Waltham
Grade:Seaside
Size:0s
Model:1891
Jewels:7j
Setting:Pendant
Finish:Nickel
Est. Date:1903
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:7470264
Added By:todix144 Profile Image todix144
3 Admirations
Serial No.: #1228757
Manufacturer:Hamilton
Grade:990
Size:16s
Model:2
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1917
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:7511017
Added By:MichaelB Profile Image MichaelB
6 Admirations
Serial No.: #12318620
Manufacturer:Elgin
Grade:270
Size:16s
Model:9
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1906
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:7539360
Added By:MichaelB Profile Image MichaelB
31 Admirations
Serial No.: #1420066
Manufacturer:Illinois
Grade:Sangamo
Size:16s
Model:5
Jewels:21j
Setting:Lever
Finish:Two-Tone
Est. Date:1898
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:7593051
Added By:CJEmpire3 Profile Image CJEmpire3
2 Admirations
Serial No.: #28679113
Manufacturer:Elgin
Grade:345
Size:12s
Model:3
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1926
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Case Serial:7650030
Added By:dfurtado Profile Image dfurtado
4 Admirations
Serial No.: #1015375
Manufacturer:E. Howard Watch Co. (Keystone)
Grade:Series 9
Size:16s
Model:1903
Jewels:19j
Setting:Pendant
Finish:Nickel
Est. Date:1903
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:7699941
Added By:MichaelB Profile Image MichaelB
5 Admirations
Serial No.: #1564858
Manufacturer:Illinois
Grade:Bunn
Size:18s
Model:6
Jewels:17j
Setting:Lever
Finish:Two-Tone
Est. Date:1901
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:7765932
Added By:thodge0001 Profile Image thodge0001
21 Admirations
Serial No.: #1526602
Manufacturer:Hamilton
Grade:996
Size:16s
Model:2
Jewels:19j
Setting:Lever
Finish:Nickel
Est. Date:1923
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Case Serial:7802760
Added By:Mobilaero Profile Image Mobilaero
2 Admirations
Serial No.: #5075694
Manufacturer:Illinois
Grade:305
Size:16s
Model:7
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1928
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Case Serial:7824093
Added By:bsheets Profile Image bsheets
2 Admirations
Serial No.: #13336345
Manufacturer:Waltham
Grade:No. 625
Size:16s
Model:1899
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1903
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:7937923
Added By:MichaelB Profile Image MichaelB
15 Admirations
Serial No.: #755947
Manufacturer:Hamilton
Grade:972
Size:16s
Model:1
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1910
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:20
Case Serial:8048894
Added By:Mobilaero Profile Image Mobilaero
4 Admirations
Serial No.: #807399
Manufacturer:Hamilton
Grade:993
Size:16s
Model:1
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1911
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Guarantee:25
Case Serial:8144952
Added By:MichaelB Profile Image MichaelB
2 Admirations
Serial No.: #735421
Manufacturer:Hamilton
Grade:974
Size:16s
Model:1
Jewels:17j
Setting:Pendant
Finish:Nickel
Est. Date:1909
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:8225540
Added By:Mmmorici Profile Image Mmmorici
3 Admirations
Serial No.: #1896117
Manufacturer:Hampden
Grade:Gen'l Stark
Size:16s
Model:4
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:1904
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:8232915
Added By:texnet Profile Image texnet
2 Admirations
Serial No.: #B637791
Manufacturer:Hamilton
Grade:999 Ball
Size:16s
Model:Ball
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1930
Case Model:J.Boss
Case Material:Goldfilled
Gold Karat:14
Case Serial:8306601
Added By:Joef21 Profile Image Joef21
3 Admirations
Serial No.: #18138910
Manufacturer:Waltham
Grade:No. 645
Size:16s
Model:1908
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1911
Case Model:J.Boss
Case Material:Goldfilled
Guarantee:25
Case Serial:8315916
Added By:RacerX Profile Image RacerX