Seth Thomas Watch Co. Serial Number 478250

Specs Production Registry 73 Value Guide 252

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From the American Horology Archive:

Seth Thomas Watch Co.

Grade: 35

Private Label(s) in Run:

Edgemere - Chicago, Ill.

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Manufacturer:	Seth Thomas	?
Manufacturer Location:	Thomaston, Connecticut	?
Movement Serial Number:	478250	?
Grade:	35	?
Model:	17	?
Estimated Production Year:	1905	?
Run Quantity:	21,000	?
Grade/Model Run:	11 of 26	?
Grade/Model Total Production:	99,800	?
Variant Est. Production:	93,600 (6S-M17-L-T)	?
Size:	6s	?
Jewels:	7j	?
Movement Configuration:	Hunting	?
Movement Finish:	Two-Tone	?
Finish Pattern:	Inlaid Cirlce	?
Movement Setting:	Lever	?
Plate:	3/4 Plate	?
Regulator:	Plain	?
Hairspring:	Breguet	?
Adjusted:	No	?
Railroad Grade:	No	?
Movement Markings:	Seth Thomas Thomaston, Conn. Safety Pinion	?
Case:	Various	?
Run ID:	701.35G39.6S119.617M35.H250.L611.7J131	?
Data Research:	1904 Seth Thomas Serial List	?
Database Version:	v52.978	?
Advanced Metrics
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Registry Population: Scoped for This Run Only:	73 (0.35%)	?

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Explore Population Registry 73 registered watches

Population Registry for This Run

Total Known Population In Run 73/21,000

Percentage of Total Run 0.35%

There are 73 watches in the population registry for this run with 32 images.
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Does this information describe your movement accurately?

Verification reports help confirm surviving examples and flag data that needs further research.

Why Might This Information Be Incorrect?

Verification Reports for this Run

The following reports have been submitted by members in reference to this production run. These reports help verify data and track inaccuracies that require further research.

SethThomasFan · November 3, 2025

Serial Number 478250 was reported as inaccurate.

No further details were submitted with the report.

SethThomasFan · March 9, 2025

Serial Number 470422 was reported as inaccurate.

Note: Grade: 205
Jewels: 15j
Movement Markings: Seth Thomas
Thomaston, Conn.
Safety Pinion
15 Jewels

PHIL1199 · July 5, 2024

Serial Number 471617 was reported as accurate.

Anonymous · May 11, 2024

Serial Number 475319 was reported as accurate.

SethThomasFan · August 6, 2023

Serial Number 478585 was reported as inaccurate.

Note: Presently eBay item number 403971222941

Grade: EDGEMERE
Movement Markings: EDGEMERE
CHICAGO
ILL.
7 JEWELS
SAFETY PINION

Curator Response: Thanks!

cbzimm · February 5, 2022

Serial Number 471962 was reported as accurate.

Anonymous · June 10, 2021

Serial Number 472770 was reported as accurate.

kevinstang · March 29, 2021

Serial Number 467434 was reported as accurate.

Anonymous · September 8, 2020

Serial Number 469824 was reported as accurate.

Anonymous · March 19, 2020

Serial Number 471700 was reported as inaccurate.

Note: Model 14

Curator Response: According to Seth Thomas factory model records, this run falls within the Model 17 designated block. Please upload images for further evaluation.