Pocket Watch Database

From the American Horology Archive:
Seth Thomas Grade 171 Pocket Watch

Seth Thomas Watch Co.

Grade: 171

Manufacturer: Seth Thomas Question Mark
Manufacturer Location: Thomaston, Connecticut Question Mark
Movement Serial Number: 98399 Question Mark
Grade: 171 Question Mark
Model: 2 Question Mark
Estimated Production Year: Login to View Question Mark
Run Quantity: Login to View Question Mark
Grade/Model Run: Login to View Question Mark
Grade/Model Total Production: Login to View Question Mark
Size: 18s Question Mark
Jewels: 15j Question Mark
Jewel Setting: Login to View Question Mark
Movement Configuration: Hunting Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Wind Mechanism: Pendant Question Mark
Plate: 3/4 Plate Question Mark
Balance Type: Expansion Question Mark
Regulator: Login to View Question Mark
Hairspring: Login to View Question Mark
Standard Dial Type: Login to View Question Mark
Adjusted: Login to View Question Mark
Railroad Grade: Login to View Question Mark
U.S. Patents: Login to View Question Mark
Movement Markings: Login to View
Case: Various Question Mark
Run ID: 231.171G20.18S229.182M125.H125.L213.15J99 Question Mark
Data Research: 1904 Seth Thomas Serial List
Question Mark
Database Version: v52.645 Question Mark
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Registry Population:
Scoped for This Run Only
3 (0.63%) Question Mark
12 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, Railroad Grade Designation, U.S. Patents, Movement Markings

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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.


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

Serial Number 98399 was reported as accurate.

Anonymous · April 13, 2021

Serial Number 98575 was reported as accurate.

Changes since this report was submitted:
Grade changed from Unknown to 171

Anonymous · December 30, 2020

Serial Number 98573 was reported as inaccurate.

Note: Grade 180 16 or 17 jewels
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Unknown to 171

Anonymous · February 16, 2015

Serial Number 98569 was reported as accurate.

Changes since this report was submitted:
Grade changed from Unknown to 171
Movement Finish changed from Gilt or Nickel to Nickel

Anonymous · February 16, 2015

Serial Number 98569 was reported as accurate.

Changes since this report was submitted:
Grade changed from Unknown to 171
Movement Finish changed from Gilt or Nickel to Nickel
Seth Thomas Grade 171 Pocket Watch