Identify The Model

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.

The Model 1

18-Size

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

Model 1

The Model 2

18-Size

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

Model 2

The Model 3

18-Size

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

Model 3

The Model 4

18-Size

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

Model 4

The Model 5

18-Size

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 5

The Models 6 and 7

18-Size

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

Models 6 and 7

The Models 8 and 9

18-Size

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

Models 8 and 9

The Models 10 to 13

18-Size

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

Models 10 and 11

18-Size

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

Models 12 and 13

The Model 14

6-Size

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

Model 14

The Models 15 to 19

6-Size

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

Models 15 to 19

The Model 20

0-Size

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

Model 20

The Model 21

16-Size

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 21

The Models 22 and 23

12-Size

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

Models 22 and 23

The Model 24

4-Size

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

Model 24

The Total Production

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.

Master SN Chart (pdf)

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Master Grade Chart (pdf)

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