Pocket Watch Database

From the American Horology Archive:
Seth Thomas Grade 506 Pocket Watch

Seth Thomas Watch Co.

Grade: 506

Manufacturer: Seth Thomas Question Mark
Manufacturer Location: Thomaston, Connecticut Question Mark
Movement Serial Number: 77844 Question Mark
Grade: 506 Question Mark
Model: 3 Question Mark
Estimated Production Year: 1894 Question Mark
Run Quantity: 400 Question Mark
Grade/Model Run: 4 of 5 Question Mark
Grade/Model Total Production: 1,200 Question Mark
Variant Est. Production: 1,180 (18S-M3-17J-ONL) Question Mark
Size: 18s Question Mark
Jewels: 17j Question Mark
Jewel Setting: Screw-Set Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Plate: 3/4 Plate Question Mark
Balance Type: Expansion Question Mark
Regulator: Reed Question Mark
Hairspring: Flat Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Movement Markings: Seth Thomas
Thomaston, Conn.
Safety Pinion
Adjusted to Temperature & Position
Case: Various Question Mark
Run ID: 171.506G4.18S171.183M69.O79.L161.17J17 Question Mark
Data Research: 1904 Seth Thomas Serial List
Question Mark
Database Version: v52.526 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
3.61 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
10.22 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.085% Question Mark
Registry Population:
Scoped for This Run Only
4 (1.00%) Question Mark

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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 · February 14, 2022

Serial Number 77967 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 16j or 17j to 17j

Anonymous · November 27, 2020

Serial Number 77844 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 16j or 17j to 17j

Anonymous · July 19, 2020

Serial Number 77605 was reported as inaccurate.

Note: Gilt finish 7jewel
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:
Jewels changed from 16j or 17j to 17j

Anonymous · July 16, 2017

Serial Number 77842 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 16j or 17j to 17j

ngupaan 95 · November 11, 2016

Serial Number 77842 was reported as inaccurate.

Note: This is not a Grade 506 but a Grade 179
Curator Response: In the 1896 Becken catalog, grade 506 is described as having a double-sunk dial, whereas grade 179 does not. Therefore, this particular watch matches grade 506 more cosely.
Changes since this report was submitted:
Jewels changed from 16j or 17j to 17j

Anonymous · March 5, 2016

Serial Number 77777 was reported as accurate.

Changes since this report was submitted:
Grade changed from 33 to 506
Jewels changed from 7J to 17j
Movement Finish changed from Gilt to Nickel
Adjusted changed from No to Yes
Seth Thomas Grade 506 Pocket Watch