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Keystone Watch Case Co.

Keystone Watch Case Co.

Case Grades

Note: This chart is not intended to be a comprehensive list of grades. Some grades changed traits over time and other grades may not be listed. This chart will be improved as additional information is studied.

Image Name Case Material Gold Content Gurantee Source Catalogs Trademarked
10K Gold 10K
Watch Case Marking for Keystone Watch Case Co. 14K Keystone 14K Keystone Symbol Guaranteed 14K .585 Fine The K.W.C.Co. 14K Gold 14K 1887LAM, 1890AP, 1890OY, 1892WES, 1893BHIA, 1894NRC, 1895OY, 1896OY, 1897BB, 1899BHIA, 1900BHIA, 1902ACB, 1903BAC, 1903ACB, 1903FDW, 1904ACB, 1905ACB, 1905FNCS, 1905ON, 1906ON, 1907ACB, 1907JVF, 1912COC, 1913FDW, 1923CBN, 1923ON, 1925ASJ, 1928ON
Watch Case Marking for Keystone Watch Case Co. 18K Keystone 18K in Pointed Ribbon Embossed 18K Gold 18K
Advance
B.W. Raymond Label 10K Gold-Filled 10K
Watch Case Marking for Keystone Watch Case Co. Base Metal Keystone Co. Base Metal Base Metal Nickel Alloy 1942WAG
Beehive Nov 13, 1900
Watch Case Marking for Keystone Watch Case Co. Boss 10K Yellow GF Boss 10K Yellow GF Gold-Filled 10K 1928ON, 1932ON, 1942WAG
Boss 14K Green GF Gold-Filled 14K 1928ON, 1932ON, 1942WAG
Boss 14K White GF Gold-Filled 14K 1928ON, 1932ON, 1942WAG
Watch Case Marking for Keystone Watch Case Co. Boss Extra Crown and Scales with Letter X Boss Extra Gold-Filled 14K 25-Year 1889BAM, 1890BA, 1890SFM, 1890AP, 1890OY, 1890CHK, 1891SAC
Watch Case Marking for Keystone Watch Case Co. Boss Extra Permanent Keystone Watch ase Co. Keystone Crown and Scales J.Boss Extra Boss Extra Permanent Gold-Filled 14K Permanent 1903BAC, 1905ACB
Watch Case Marking for Keystone Watch Case Co. Boss Patent Crown and Scales Boss Patent Gold-Filled 14K 20-Year 1883UNK, 1884LSS, 1885OY, 1887LAM, 1887BHIA, 1888OY, 1888BA, 1889EVR
Watch Case Marking for Keystone Watch Case Co. Boss Scale 10K/15YR Scales Boss Scale 10K/15YR
J.Boss
Gold-Filled 10K 15-Year 1890OY[20YR], 1890BA, 1890SFM, 1890AP, 1890OY, 1890CHK, 1891RR, 1891SAC, 1892ACR[20YR], 1892WES, 1892BAC, 1892CPS, 1893MCE, 1893SAC, 1893BHIA, 1893BFNA, 1894NRC, 1894BA, 1894BATM, 1895SFM, 1895OY, 1896OY, 1896MF, 1897BB, 1898MLMF
Watch Case Marking for Keystone Watch Case Co. Boss Scale 10K/20YR Keystone Watch Case Co. Scales Guaranteed J.Boss 20 Years 10K U.S.A. Gold Filled Boss Scale 10K/20YR
J.Boss
Gold-Filled 10K 20-Year 1899BHIA, 1899ACB, 1900NHW, 1900BA, 1900BHIA, 1901OY, 1901BAC, 1902BB, 1902BATM, 1903BAC, 1903N76, 1903ACB, 1903FDW, 1904ACB, 1904BA, 1904LB, 1905ACB, 1905FNCS, 1905BAC, 1905ON, 1906ON, 1907NAC, 1907NBC, 1908ACB, 1910ACB, 1911OY, 1912HA, 1913FDW, 1915ON, 1925ASJ, 1899SAC, 1900LMC, 1902ACB, 1903ON, 1907OY, 1907ACB, 1907JVF, 1909BAC, 1912COC, 1912SFM, 1914ELD
Watch Case Marking for Keystone Watch Case Co. Boss Scale Crown 14K/20YR Crown and Scales Keystone Watch Case Co. Crown and Scales Boss Scale Crown 14K/20YR
J.Boss
Gold-Filled 14K 20-Year 1889BAM, 1890BA, 1890SFM, 1890AP, 1890OY, 1890CHK, 1891RR, 1891SAC, 1892CPS, 1892WES, 1892ACR, 1892BAC, 1893SAC, 1893BHIA, 1893BFNA, 1894NRC, 1894BA, 1895SFM, 1895OY, 1896OY, 1896MF, 1897BB, 1898MLMF Aug 8, 1911
Watch Case Marking for Keystone Watch Case Co. Boss Scale Crown 14K/25YR Keystone Watch Case Co. Crown and Scales J.Boss 25 Years 14K Guaranteed J.Boss 14K Boss Scale Crown 14K/25YR
J.Boss
Gold-Filled 14K 25-Year 1899BHIA, 1899ACB, 1900NHW, 1900BA, 1900BHIA, 1901OY, 1901BAC, 1902BB, 1902BATM, 1903BAC, 1903N76, 1903ACB, 1903FDW, 1904BA, 1904LB, 1905FNCS, 1905BAC, 1906ON, 1907NAC, 1907ACB, 1907NBC, 1910ACB, 1911OY, 1911NG, 1912NG, 1912HA, 1913FDW, 1915ACB, 1915ON, 1916LCM, 1917BA, 1923CBN, 1923ON, 1899SAC, 1900LMC, 1902MF, 1902ACB, 1903ON, 1904ACB, 1905ACB, 1905ON, 1907OY, 1907JVF, 1908ACB, 1909BAC, 1912COC, 1912SFM, 1914ELD Aug 8, 1911
Bunn Special Model Gold-Filled 10K
Watch Case Marking for Keystone Watch Case Co. Cyclone Keystone Letter C U.S.A Keystone Watch Case Co. C Case. Cyclone Rolled Gold Plate 5-Years 1890AP, 1891RR, 1891SAC, 1892WES, 1892BAC, 1893BHIA, 1893BFNA, 1894BA, 1894BATM, 1895SFM, 1895OY, 1896OY, 1897BB, 1898MLMF Nov 13, 1900
Watch Case Marking for Keystone Watch Case Co. Cyclone Guaranteed Cyclone 10 Years Keystone Letter C U.S.A Keystone Watch Case Co. C Case. Cyclone Rolled Gold Plate 10-Year 1899BHIA, 1899ACB[10GF], 1900NHW, 1900BHIA, 1900LMC[10KGF], 1901OY, 1901BAC, 1902ACB[10KGF], 1902BB, 1902BATM, 1903ACB[10KGF], 1903ON, 1903BAC, 1903FDW[10KGF], 1904BA, 1905FNCS, 1899SAC[10KGF], 1904ACB[10KGF], 1905ACB[10KGF] Nov 13, 1900
Excelsior 10YR Gold-Filled 10-Year 1908ACB, 1910ACB, 1911OY, 1915ACB
Excelsior 20YR Gold-Filled 20-Year 1908ACB, 1910ACB, 1911OY, 1914ELD, 1915ACB, 1915ON
Watch Case Marking for Keystone Watch Case Co. Excelsior Silverode Excelsior Silverode NYS W Co. NYS Monogram Excelsior Silverode Nickel Alloy
Goldoid 1890SFM
Watch Case Marking for Keystone Watch Case Co. Indian Indian Rolled Gold Plate May 28, 1912
Keystone 10K Yellow GF Gold-Filled 10K 1942WAG
Keystone 14K White GF Gold-Filled 14K 1942WAG
Keystone Chromium Chromium 1942WAG
Watch Case Marking for Keystone Watch Case Co. Keystone Coin Silver Keystone Coin C in Keystone Keystone Coin Silver Coin Silver 1882SFM, 1883UNK, 1883GHR, 1885OY, 1888OY, 1891RR, 1891SAC, 1893BHIA, 1899SAC, 1901OY
Watch Case Marking for Keystone Watch Case Co. Keystone Extra Keystone Extra Co. Keystone Keystone Extra Gold-Filled 14K Permanent 1902BB, 1903ON, 1904ACB, 1904BA, 1904LB, 1905FNCS, 1905BAC, 1905ON, 1923CBN Feb 28, 1911
Watch Case Marking for Keystone Watch Case Co. Keystone Filled Keystone Filled Gold-Filled 14K 15-Year 1889EVR Feb 28, 1911
Watch Case Marking for Keystone Watch Case Co. Keystone Filled Keystone Filled Gold-Filled 14K 20-Year 1887BHIA, 1889EVR Feb 28, 1911
Watch Case Marking for Keystone Watch Case Co. Keystone Rolled Gold Plate Cased and Timed by Elgin National Watch Co. Keystone 10K Rolled Gold Plate in Circle Keystone Rolled Gold Plate Rolled Gold Plate 10K 1942WAG
Keystone Silver Silver 1899BHIA, 1899ACB
Keystone Stainless Steel Stainless Steel 1942WAG
Watch Case Marking for Keystone Watch Case Co. Keystone Star Keystone Star in Pointed Ribbon Star Keystone Star Gold-Filled 10K 15-Year 1889BAM
Watch Case Marking for Keystone Watch Case Co. Keystone Star Keystone Star in Pointed Ribbon Star Keystone Star Gold-Filled 10K 10-Year 1887LAM, 1888OY, 1888BA, 1889EVR
Watch Case Marking for Keystone Watch Case Co. Keystone Sterling Keystone Watch Case Co. Keystone Symbol Sterling Guaranteed Sterling 925 Fine U.S.A. Keystone Sterling Silver Keystone Sterling Silver 1900BHIA, 1901OY, 1902BB, 1902MF, 1902ACB, 1903BAC, 1903ACB, 1903FDW, 1904ACB, 1904BA, 1904LB, 1905ACB, 1905BAC, 1905ON, 1906ON, 1908ACB, 1942WAG
Keystone Yellow Base Metal Base Metal 1942WAG
Watch Case Marking for Keystone Watch Case Co. Leader Leader Coin in Pointed Ribbon Keystone Leader Coin Leader Coin Silver 1888OY, 1890AP, 1890OY, 1890CHK, 1891RR, 1892WES, 1893SAC, 1893BHIA, 1893BFNA, 1894BATM, 1895OY, 1896OY, 1896MF, 1897BB, 1902BATM
Lion Gold-Filled 10K 15-Year 1890BA, 1890OY, 1893MCE, 1893BHIA, 1894BA, 1896OY
Lion Gold-Filled 10K 20-Year 1899BHIA, 1899ACB, 1900LMC, 1900BA, 1900BHIA, 1901OY, 1901BAC, 1902ACB, 1902MF[14K]
Watch Case Marking for Keystone Watch Case Co. Nickeloid Keystone Watch Case Co. Keystone Symbol Nickloid Made In U.S.A. Nickeloid Nickel Alloy 1925ASJ, 1928ON, 1932ON
Niello Sterling Silver 1900NHW, 1900BHIA, 1902BB, 1902ACB, 1903BAC, 1903FDW, 1904LB, 1905BAC
President
Senator Rolled Gold Plate 1895OY
Watch Case Marking for Keystone Watch Case Co. Silveroid Keystone Watch Case Co. Guaranteed Silveroid Genuine Silveroid in Pointed Ribbon Silveroid Nickel Alloy 1890SFM, 1890AP, 1890OY, 1890CHK, 1892BAC, 1893BHIA, 1893BFNA, 1894BA, 1894BATM, 1896MF, 1899BHIA, 1899ACB, 1900NHW, 1900BHIA, 1903BAC, 1903ACB, 1903FDW, 1904BA, 1904LB, 1905FNCS, 1906ON, 1907NAC, 1907ACB, 1907NBC, 1910ACB, 1911OY, 1912HA, 1913FDW, 1915ON, 1916LCM, 1917BA, 1923ON, 1887BHIA, 1888OY, 1889BAM, 1890BA, 1891RR, 1891SAC, 1892WES, 1893SAC, 1897BB, 1898MLMF, 1899SAC, 1900LMC, 1901OY, 1902BB, 1902ACB, 1903ON, 1904ACB, 1905ACB, 1905ON, 1907OY, 1907JVF, 1908ACB, 1912COC, 1914ELD
Watch Case Marking for Keystone Watch Case Co. Union Union Shield with Stars and Stripes Union Rolled Gold Plate 10K 15-Year 1890AP
Watch Case Marking for Keystone Watch Case Co. Victory Keystone Co. Victory in Pointed Ribbon 10K Rolled Gold Plate Victory Rolled Gold Plate 10K 1925CPS, 1932ON
Waltham Colonial 14K Gold 14K
Waltham Label 10K Gold-Filled 10K

American Case Trademarks & Hallmarks

Watch Case Non Pull Out Bow

Watch Case Non Pull Out Bow
Trademark Number: 18464
Description: Watch Case Non Pull Out Bow
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Sep 30, 1890
Registration Type: Trademark

Watch & Watch Case Perfection

Watch & Watch Case Perfection
Trademark Number: 24481
Description: Watch & Watch Case Perfection
Issued To: Zurbrugg Theophilus
Trademark Date: Apr 10, 1894
Registration Type: Trademark

Watch & Watch Case Premier

Watch & Watch Case Premier
Trademark Number: 24482
Description: Watch & Watch Case Premier
Issued To: Zurbrugg Theophilus
Trademark Date: Apr 10, 1894
Registration Type: Trademark

Watch & Watch Case Privateer

Watch & Watch Case Privateer
Trademark Number: 24483
Description: Watch & Watch Case Privateer
Issued To: Zurbrugg Theophilus
Trademark Date: Apr 10, 1894
Registration Type: Trademark

Watch & Watch Case Protector

Watch & Watch Case Protector
Trademark Number: 24484
Description: Watch & Watch Case Protector
Issued To: Zurbrugg Theophilus
Trademark Date: Apr 10, 1894
Registration Type: Trademark

Watch & Watch Case Palatine

Watch & Watch Case Palatine
Trademark Number: 24485
Description: Watch & Watch Case Palatine
Issued To: Zurbrugg Theophilus
Trademark Date: Apr 10, 1894
Registration Type: Trademark

Watch Case President

Watch Case President
Trademark Number: 24710
Description: Watch Case President
Issued To: Zurbrugg Theophilus
Trademark Date: May 15, 1894
Registration Type: Trademark

Watch Case Arm And Hand Holding Hammer

Watch Case Arm And Hand Holding Hammer
Trademark Number: 28259
Description: Watch Case Arm And Hand Holding Hammer
Issued To: Zurbrugg Theophilus
Trademark Date: May 19, 1896
Registration Type: Trademark

Watch Case & Movement Pan-American

Watch Case & Movement Pan-American
Trademark Number: 30073
Description: Watch Case & Movement Pan-American
Issued To: Zurbrugg Theophilus
Trademark Date: May 25, 1897
Registration Type: Trademark

Watch Case Keystone Watch Case Co. With Keystone Symbol

Watch Case Keystone Watch Case Co. With Keystone Symbol
Trademark Number: 35378
Description: Watch Case Keystone Watch Case Co. With Keystone Symbol
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Pan-America

Watch Case Pan-America
Trademark Number: 35379
Description: Watch Case Pan-America
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Keystone Symbol With Co.

Watch Case Keystone Symbol With Co.
Trademark Number: 35380
Description: Watch Case Keystone Symbol With Co.
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Cyclone

Watch Case Cyclone
Trademark Number: 35381
Description: Watch Case Cyclone
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Boss

Watch Case Boss
Trademark Number: 35382
Description: Watch Case Boss
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Bee Hive

Watch Case Bee Hive
Trademark Number: 35383
Description: Watch Case Bee Hive
Issued To: Keystone Watch Case Co
Zurbrugg Theophilus P
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Keystone

Watch Case Keystone
Trademark Number: 35384
Description: Watch Case Keystone
Issued To: Keystone Watch Case Co
Roberts H L
Trademark Date: Nov 13, 1900
Registration Type: Trademark

Watch Case Letter C

Watch Case Letter C
Trademark Number: 38526
Description: Watch Case Letter C
Issued To: Keystone Watch Case Co
Roberts Howard L
Trademark Date: Jul 1, 1902
Registration Type: Trademark

Watch Case Pan-America

Watch Case Pan-America
Trademark Number: 44603
Description: Watch Case Pan-America
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case Boss

Watch Case Boss
Trademark Number: 44604
Description: Watch Case Boss
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case Keystone

Watch Case Keystone
Trademark Number: 44605
Description: Watch Case Keystone
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case Keystone Watch Case Co With Keystone Symbol

Watch Case Keystone Watch Case Co With Keystone Symbol
Trademark Number: 44606
Description: Watch Case Keystone Watch Case Co With Keystone Symbol
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case [ Keystone Symbol With Co. ]

Watch Case [ Keystone Symbol With Co. ]
Trademark Number: 44607
Description: Watch Case [ Keystone Symbol With Co. ]
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case Cyclone

Watch Case Cyclone
Trademark Number: 44608
Description: Watch Case Cyclone
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 18, 1905
Registration Type: Trademark

Watch Case [ Bee Hive ]

Watch Case [ Bee Hive ]
Trademark Number: 44898
Description: Watch Case [ Bee Hive ]
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Jul 25, 1905
Registration Type: Trademark

Watch Case K W C Co

Watch Case K W C Co
Trademark Number: 45834
Description: Watch Case K W C Co
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Aug 29, 1905
Registration Type: Trademark

Watch Case & Movement Carmen

Watch Case & Movement Carmen
Trademark Number: 55389
Description: Watch Case & Movement Carmen
Issued To: Keystone Watch Case Co
Zurbrugg Theophilus P
Trademark Date: Aug 14, 1906
Registration Type: Trademark

Extra

Extra
Trademark Number: 81081
Description: Extra
Issued To: Keystone Watch Co
Fogg Charles
Trademark Date: Feb 28, 1911
Registration Type: Trademark

[ Indian Head ]

[ Indian Head ]
Trademark Number: 81625
Description: [ Indian Head ]
Issued To: Philadelphia Watch Case Co
Fogg Charles M T
Assignee: Keystone Watch Case Co
Trademark Date: Apr 25, 1911
Registration Type: Trademark

Watch Movement Case & Part New York Standard Watch

Watch Movement Case & Part New York Standard Watch
Trademark Number: 81884
Description: Watch Movement Case & Part New York Standard Watch
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: May 16, 1911
Registration Type: Trademark

Watch Case Movement & Part Crown And Scales

Watch Case Movement & Part Crown And Scales
Trademark Number: 82993
Description: Watch Case Movement & Part Crown And Scales
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Aug 8, 1911
Registration Type: Trademark

Watch Case & Movement The Crescent Watch Case Co

Watch Case & Movement The Crescent Watch Case Co
Trademark Number: 84494
Description: Watch Case & Movement The Crescent Watch Case Co
Issued To: Keystone Watch Case Co
Zurbrugg Theophilus P
Trademark Date: Dec 19, 1911
Registration Type: Trademark

Watch Movement Case & Part Philadelphia Watch Case

Watch Movement Case & Part Philadelphia Watch Case
Trademark Number: 86412
Description: Watch Movement Case & Part Philadelphia Watch Case
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: May 7, 1912
Registration Type: Trademark

[ Indian Head ]

[ Indian Head ]
Trademark Number: 86716
Description: [ Indian Head ]
Issued To: Keystone Watch Case Co
Mueller John
Trademark Date: May 28, 1912
Registration Type: Trademark

Watch Case & Movement Peer

Watch Case & Movement Peer
Trademark Number: 99754
Description: Watch Case & Movement Peer
Issued To: Keystone Watch Case Co
Fogg Charles
Trademark Date: Sep 15, 1914
Registration Type: Trademark

Watch Case Movement & Part B & B Guaranteed 20 Year

Watch Case Movement & Part B & B Guaranteed 20 Year
Trademark Number: 106237
Description: Watch Case Movement & Part B & B Guaranteed 20 Year
Issued To: Keystone Watch Case Co
Fogg C M
Trademark Date: Oct 19, 1915
Registration Type: Trademark

Watch Case Movement & Part Tudor

Watch Case Movement & Part Tudor
Trademark Number: 115518
Description: Watch Case Movement & Part Tudor
Issued To: Keystone Watch Case Co
Fogg Charles M
Trademark Date: Feb 20, 1917
Registration Type: Trademark

Watch Case Movement & Part Augustan

Watch Case Movement & Part Augustan
Trademark Number: 115519
Description: Watch Case Movement & Part Augustan
Issued To: Keystone Watch Case Co
Fogg Charles M
Trademark Date: Feb 20, 1917
Registration Type: Trademark

Watch Case Movement & Part Ionic

Watch Case Movement & Part Ionic
Trademark Number: 115520
Description: Watch Case Movement & Part Ionic
Issued To: Keystone Watch Case Co
Fogg Charles M
Trademark Date: Feb 20, 1917
Registration Type: Trademark

Watch Case Non-Pull-Out Bow

Watch Case Non-Pull-Out Bow
Trademark Number: 136841
Description: Watch Case Non-Pull-Out Bow
Issued To: Keystone Watch Case Co
Kain F H T
Trademark Date: Nov 9, 1920
Registration Type: Trademark