Pocket Watch Database

Keystone Watch Case Co. Silveroid
Watch Case Marking for Keystone Watch Case Co. Silveroid: Keystone
Watch Case Co.
[Keystone Block]
Silveroid

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.

Silveroid

Database ID:PWDB-19
Case Grade:Silveroid
Material:Nickel Alloy
Introduced:April 1886
Note:Introduced in April 1886 [The Trader, Ad, April 1886].
Marking Variants:
(Not Intended to be Comprehensive)
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.: #16650664
Manufacturer:Elgin
Grade:292
Size:16s
Model:6
Jewels:7j
Setting:Pendant
Finish:Gilt
Est. Date:1912
Case Material:Silver
Added By:kh125mick Profile Image kh125mick
5 Admirations
Serial No.: #4824443
Manufacturer:Omega Watch Co.
Grade:Trench Watch
Size:0s
Model:
Jewels:15j
Setting:Pendant
Finish:Nickel
Est. Date:1916
Case Material:Silver
Added By:wmike565 Profile Image wmike565
11 Admirations
Serial No.: #518287
Manufacturer:Rockford
Grade:910
Size:18s
Model:9
Jewels:21j
Setting:Lever
Finish:Nickel
Est. Date:1898
Case Model:5 oz. Coin
Case Material:Coinsilver
Added By:wmike565 Profile Image wmike565
2 Admirations
Serial No.: #19172955
Manufacturer:Elgin
Grade:298
Size:0s
Model:2
Jewels:7j
Setting:Pendant
Finish:Gilt
Est. Date:1917
Case Material:Silver
Added By:JJackW Profile Image JJackW
3 Admirations
Serial No.: #122037
Manufacturer:Rockford
Grade:Unknown
Size:18s
Model:1
Jewels:11j
Setting:Key
Finish:Gilt
Est. Date:1881
Case Model:4oz coin silver
Case Material:Coinsilver
Added By:Dave895 Profile Image Dave895
5 Admirations
Serial No.: #768590
Manufacturer:Waltham
Grade:Wm. Ellery
Size:18s
Model:1857
Jewels:11j
Setting:Key
Finish:Gilt
Est. Date:October 1874 - December 1, 1874
Case Model:Leader
Case Material:Coinsilver
Added By:winterwolf Profile Image winterwolf
2 Admirations
Serial No.: #25795
Manufacturer:Hamilton
Grade:931
Size:18s
Model:2
Jewels:16j
Setting:Lever
Finish:Nickel
Est. Date:1897
Case Model:Century
Case Material:Silver
Added By:winterwolf Profile Image winterwolf
3 Admirations
Serial No.: #4C39665
Manufacturer:Hamilton
Grade:4992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1941
Case Material:Coinsilver
Case Serial:K018578
Added By:orsogrigio Profile Image orsogrigio
3 Admirations
Serial No.: #3C2471
Manufacturer:Hamilton
Grade:3992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1942
Case Material:Silver
Case Serial:K016750
Added By:bwalder Profile Image bwalder
6 Admirations
Serial No.: #4C55840
Manufacturer:Hamilton
Grade:4992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1941
Case Material:Silver
Case Serial:K019173
Added By:tsullivan Profile Image tsullivan
5 Admirations
Serial No.: #4C34564
Manufacturer:Hamilton
Grade:4992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1941
Case Material:Silver
Case Serial:K015941
Added By:joexiao1 Profile Image joexiao1
4 Admirations
Serial No.: #CY12816
Manufacturer:Hamilton
Grade:748
Size:8/0s
Model:748
Jewels:18j
Setting:Pendant
Finish:Nickel
Est. Date:1948
Case Material:Sterlingsilver
Case Serial:K352904
Added By:ApertureArrange Profile Image ApertureArrange
4 Admirations
Serial No.: #4C54640
Manufacturer:Hamilton
Grade:4992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1941
Case Material:Silver
Case Serial:K039753
Added By:gneissnz Profile Image gneissnz
2 Admirations
Serial No.: #CY20418
Manufacturer:Hamilton
Grade:748
Size:8/0s
Model:748
Jewels:18j
Setting:Pendant
Finish:Nickel
Est. Date:1949
Case Model:K
Case Material:Sterlingsilver
Case Serial:K224978
Added By:Grizzy Profile Image Grizzy
4 Admirations
Serial No.: #4C64710
Manufacturer:Hamilton
Grade:4992b
Size:16s
Model:5
Jewels:22j
Setting:Pendant
Finish:Nickel
Est. Date:1941
Case Material:Silver
Case Serial:K049157
Added By:Subman654 Profile Image Subman654
4 Admirations
Serial No.: #2234824
Manufacturer:Waltham
Grade:P.S. Bartlett
Size:18s
Model:1877
Jewels:11j
Setting:Lever
Finish:Gilt
Est. Date:October 1883 - February 28, 1884
Case Model:Century
Case Material:Coinsilver
Case Serial:3215
Added By:OhBugman Profile Image OhBugman
5 Admirations
Serial No.: #7674
Manufacturer:Tremont Watch Co.
Grade:Tremont Watch Co.
Size:18s
Model:1
Jewels:15j
Setting:Key
Finish:Gilt
Est. Date:1867
Case Material:Coinsilver
Case Serial:4559
Added By:geoulri1 Profile Image geoulri1
3 Admirations
Serial No.: #29106
Manufacturer:Rockford
Grade:Unknown
Size:18s
Model:1
Jewels:9j
Setting:Key
Finish:Gilt
Est. Date:1877
Case Model:445354
Case Material:Coinsilver
Case Serial:5354
Added By:msterling Profile Image msterling
9 Admirations
Serial No.: #6026593
Manufacturer:Waltham
Grade:Vanguard
Size:18s
Model:1892
Jewels:17j
Setting:Lever
Finish:Nickel
Est. Date:April 1894 - June 1895
Case Material:Coinsilver
Case Serial:11998
Added By:cougwatch Profile Image cougwatch
8 Admirations
Serial No.: #359623
Manufacturer:Illinois
Grade:Columbia
Size:18s
Model:1
Jewels:11j
Setting:Key
Finish:Gilt
Est. Date:December 1881 - May 1882
Case Material:Coinsilver
Case Serial:34446
Added By:esoxhunter Profile Image esoxhunter