Pocket Watch Database

From the American Horology Archive:
Hamilton Grade 931 Pocket Watch

Hamilton Watch Co.

Grade: 931

Mixed Run: 16-Jewel and 17-Jewel Movements

Private Label(s) in Run:

The Union

What is a Private Label?
Manufacturer: Hamilton Question Mark
Manufacturer Location: Lancaster, Pennsylvania Question Mark
Movement Serial Number: 47905 Question Mark
Grade: 931 Question Mark
Model: 2 Question Mark
Class: 3 Question Mark
Estimated Production Year: 1899 Question Mark
Run Quantity: 300 Question Mark
Grade/Model Run: 14 of 14 Question Mark
Grade/Model Total Production: 4,060 Question Mark
Size: 18s Question Mark
Jewels: 16j    Mixed Run Question Mark
Movement Configuration: Hunting Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Plate: Full Plate Question Mark
Adjusted: No Question Mark
Railroad Grade: No Question Mark
Dial Feet Locations: 2.6, 18.0, 38.2 Question Mark
Case: Various Question Mark
Run ID: 148.931G14.18S147.182M73.H73.L139.16J34 Question Mark
Data Research: 1953 Hamilton Serial List
Question Mark
Database Version: v52.508 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
12.22 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
5.36 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.038% Question Mark
Registry Population:
Scoped for This Run Only
4 (1.33%) Question Mark
Research Note: Multiple reports of 17-Jewel movements in run. #47905: Originally produced as a Grade 931 and subsequently upgraded from 16 Jewels to 17 Jewels (more consistent with the Grade 925 classification).

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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 · December 1, 2022

Serial Number 47762 was reported as accurate.

Anonymous · May 15, 2021

Serial Number 47766 was reported as accurate.

Anonymous · May 12, 2021

Serial Number 47766 was reported as accurate.

Anonymous · May 26, 2020

Serial Number 47782 was reported as accurate.

Harlton Supporter 98 · February 2, 2020

Serial Number 47788 was reported as accurate.

Spartacus 3 · May 28, 2019

Serial Number 47750 was reported as accurate.

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

Anonymous · December 28, 2018

Serial Number 47936 was reported as accurate.

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

geoulri1 Supporter 58 · April 29, 2017

Serial Number 47905 was reported as inaccurate.

Note: marked 17 jewels

Wrstratton 134 · November 27, 2013

Serial Number 47849 was reported as inaccurate.

Note: Grade "the union" 17 jewel
Hamilton Grade 931 Pocket Watch