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Seth Thomas Research

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    • Model 14
    • Models 15 to 19
    • Model 20
    • Model 21
    • Models 22 and 23
    • Model 24
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Seth Thomas Research

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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

image190

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

image191

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

image192

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

image193

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

image194

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

image195

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

image196

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

image197

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
image198

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

image199

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

image200

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

image201

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

image202

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

image203

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

image204

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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