If you need help identifying your Seth Thomas pocket watch, enter the serial number of the movement - not the case - into the Search box below and scroll down to the correct model.
Serial Numbers: 1 - 10,900 uninterrupted
Production Years: 1885 to 1888
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Lever
Comments: Both slow and quick gear train
SNs: 25,101 - 100,000 / 500,001 - 559,000 in runs
Production Years: 1888 to 1900
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Key / Lever
Comments: Includes Henry Molineux grade
SNs: 10,901 - 99,400 / 500,501 - 517,500 in runs
Production Years: 1888 to 1898
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Lever
Comments: Includes Molineux & Ball grade
SNs: 35,001 - 92,000 / 509,801 - 718,200 in runs
Production Years: 1888 to 1902
Configuration: 3/4-plate hunting or open-face
Winding / Setting: Key-wind / key-set
Comments: Widest SN range of the lower models
Serial Numbers: 200,001 - 352,000 in blocks
Production Years: 1893 to 1913
Configuration: Full-plate open-face
Winding / Setting: Stem / Pendant / Lever
Comments: Includes Maiden Lane grade
Model 6
Serial Numbers: 515,301 - 646,000
Production Years: 1896 to 1904
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant / Lever
Comments: Known as Old Eagle Series
Model 7
Serial Numbers: 508,001 - 648,000
Production Years: 1896 to 1904
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Pendant / Lever
Comments: Known as Old Eagle Series
Model 8
SNs: 700,001 - 851,900 / 2,500,001 - 2,593,000
Production Years: 1902 to 1913
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant / Lever
Comments: Known as New Eagle Series
Model 9
Serial Numbers: 700,101 - 853,500
Production Years: 1902 to 1913
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Pendant / Lever
Comments: Known as New Eagle Series
Model 10
Serial Numbers: All examples unmarked
Production Years: Unknown
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant / Lever
Comments: Known as Old Century Series
Model 11
Serial Numbers: All examples unmarked
Production Years: Unknown
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Pendant / Lever
Comments: Known as Old Century Series
Model 12
Serial Numbers: 1,000,001 - 1,301,000
Production Years: 1904 to 1913
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant / Lever
Comments: Known as New Century Series
Model 13
Serial Numbers: 1,700,001 - 1,780,000
Production Years: 1904 to 1913
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Pendant / Lever
Comments: Known as New Century Series
Serial Numbers: 100,001 - 166,000 in runs
Production Years: 1890 to 1910
Configuration: 3/4-plate hunter
Winding / Setting: Stem / Lever
Comments: Only model with male stem
Serial Numbers: 128,001 - 4,012,000 in separate blocks
Production Years: 1904 to 1913
Configuration: 3/4-plate hunter
Winding / Setting: Stem / Lever
Comments: Eagle Series / Includes 12 x 6 movements
Serial Numbers: 2,000,001 - 2,005,000
Production Years: 1908 to 1913
Configuration: 3/4-plate hunting
Winding / Setting: Stem / Pendant
Comments: Includes wristwatch models
SNs: 1,304,501 - 1,360,000 / 2,593,001 - 2,600,000
Production Years: 1913 to 1914
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant
Comments: Includes Centennial grade
Model 22
Serial Numbers: 3,258,701 - 3,298,000
Production Years: 1913 to 1914
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant
Comments: Includes Centennial grade
Model 23
Serial Numbers: 3,500,001 - 3,505,000
Production Years: 1913 only
Configuration: Bridge model open-face
Winding / Setting: Stem / Pendant
Comments: Four grades including 17-jewel Adjusted
Serial Numbers: 3,050,001 - 3,103,000
Production Years: 1913 to 1914
Configuration: 3/4-plate open-face
Winding / Setting: Stem / Pendant
Comments: Includes Centennial grade
Despite period advertising, the total factory output in all sizes and models appears to be a little under two million watches, based on serial number ranges of reported examples, produced in well over a hundred established named and numbered grades.