Seth Thomas Pocket Watch: Serial Number 20640 (Grade 101)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/seth-thomas/20640/movement

Access Date: May 09, 2025

From the American Horology Archive:

Seth Thomas Watch Co.

Grade: 101

Manufacturer:	Seth Thomas
Manufacturer Location:	Thomaston, Connecticut
Movement Serial Number:	20640
Grade:	101
Model:	3
Estimated Production Year:	Login to View
Run Quantity:	Login to View
Grade/Model Run:	Login to View
Grade/Model Total Production:	Login to View
Size:	18s
Jewels:	15j
Jewel Setting:	Login to View
Movement Configuration:	Openface
Movement Finish:	Gilt
Movement Setting:	Lever
Wind Mechanism:	Pendant
Plate:	3/4 Plate
Balance Type:	Expansion
Regulator:	Login to View
Hairspring:	Login to View
Standard Dial Type:	Login to View
Adjusted:	Login to View
Movement Markings:	Login to View
Case:	Various
Run ID:	24.101G5.18S24.183M14.O24.L24.15J9
Data Research:	1904 Seth Thomas Serial List
Database Version:	v52.645
Advanced Metrics
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Registry Population: Scoped for This Run Only	5 (1.00%)

10 Additional Member-Only Data Points Available

The following information is unlocked with a free account:

Estimated Production Year, Run Quantity, Grade/Model Run, Grade/Model Total Production, Jewel Setting, Regulator Type, Hairspring, Standard Dial Type, Adjustments, Movement Markings

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 5 watches in the population registry for this run with 3 images. Create a FREE account or login to view the population registry and add your watch to the registry. Create a Free Account

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Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.

Anonymous · June 10, 2023

Serial Number 20581 was reported as accurate.

SethThomasFan Top Contributor Seth Thomas Expert Supporter 451 · January 28, 2023

Serial Number 20640 was reported as accurate.

Anonymous · December 8, 2021

Serial Number 20902 was reported as inaccurate.

Note: #20,902 is a 7 jewel watch

Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.