Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999P

Manufacturer: Ball - Hamilton Question Mark
Movement Serial Number: B639750 Question Mark
Grade: 999P Question Mark
Model: 1 Question Mark
Estimated Production Year: 1933 Question Mark
Run Quantity: 1,000 Question Mark
Grade/Model Run: 10 of 15 Question Mark
Grade/Model Total Production: 40,300 Question Mark
Size: 16s Question Mark
Jewels: 21j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Plate: 3/4 Plate Question Mark
Barrel: Going Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Railroad Grade: Yes Question Mark
U.S. Patents: D32330 Question Mark
Case: Various Question Mark
Database Version: v52.457 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
121.33 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
916.84 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
34.934% Question Mark
Registry Population:
Scoped for This Run Only
4 (0.40%) Question Mark
Research Note: Hamilton Hairspring Stud

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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.


okiejohn 387 · October 13, 2023

Serial Number B639750 was reported as accurate.

cjbrem Supporter 916 · October 12, 2023

Serial Number B639995 was reported as accurate.

Anonymous · May 8, 2022

Serial Number B639394 was reported as accurate.

Anonymous · March 19, 2022

Serial Number B639471 was reported as accurate.

Anonymous · March 6, 2021

Serial Number B639613 was reported as accurate.

LostDutchman Supporter 52 · August 6, 2019

Serial Number B639719 was reported as accurate.

WLBelkriver33 804 · March 3, 2019

Serial Number B639986 was reported as accurate.

dfchong 837 · February 18, 2019

Serial Number B639889 was reported as accurate.

Anonymous · January 17, 2019

Serial Number B639042 was reported as accurate.

Anonymous · May 4, 2018

Serial Number B639622 was reported as accurate.

Anonymous · April 3, 2018

Serial Number B639562 was reported as accurate.

Anonymous · November 8, 2017

Serial Number B639320 was reported as accurate.

Anonymous · July 24, 2014

Serial Number B639889 was reported as accurate.

Anonymous · May 10, 2014

Serial Number B639654 was reported as accurate.

Anonymous · October 9, 2013

Serial Number B639249 was reported as accurate.