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. 


Then click the button next to your model.

The Model 1

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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

The Model 2

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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

The Model 3

image3

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

The Model 4

image4

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

The Model 5

image5

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

The Models 6 and 7

image6

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 - 641,000

  Production Years:  1896 to 1904

  Configuration:  3/4-plate hunting

  Winding / Setting:  Stem / Pendant / Lever

  Comments:  Known as Old Eagle Series

The Models 8 and 9

image7

18-Size

Model 8

  SNs:  700,001 - 847,000 / 2,500,001 - 2,593,000

  Production Years:  1904 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:  1904 to 1913

  Configuration:  3/4-plate hunting

  Winding / Setting:  Stem / Pendant / Lever

  Comments:  Known as New Eagle Series

The Models 10 to 13

image8

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

image9

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

The Model 14

image10

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

The Models 15 to 19

image11

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

The Model 20

image12

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

The Model 21

image13

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

The Models 22 and 23

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12-Size

Model 22

  Serial Numbers:  3,258,001 - 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

The Model 24

image15

4-Size

Serial Numbers:  3,053,001 - 3,103,000

Production Years:  1913 to 1914 

Configuration:  3/4-plate open-face

Winding / Setting:  Stem / Pendant

Comments:   Includes Centennial grade 

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 Block Chart (pdf)

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Master Grade Chart (pdf)

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The Private Labels

Private label watches were those with the name of a person, store owner, or local jeweler inscribed on either the dial or the movement. Orders were placed through regional jobbers, who acted as distributors for the factory. No mention of cost or quantity discounts appears in any of the known catalogs or period advertisements. Private labels make up a surprisingly large percentage of total output, accounting for roughly 13% of all logged production within the models known to have contract pieces. This figure was likely much higher since private labels have no factory markings on either the dial or the movement to identify them as a Seth Thomas, and most have probably been discarded or scavenged for parts.

Seth Thomas PL Chart - Name (pdf)

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Seth Thomas PL Chart - SN (pdf)

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Seth Thomas PL Chart - State (pdf)

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