Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999G

Manufacturer: Ball - Hamilton
Movement Serial Number: 642723
Grade: 999G
Model: 1A
Estimated Production Year: 1910
Run Quantity: 175
Grade/Model Run: 12 of 15
Grade/Model Total Production: 4,400
Size: 18s
Jewels: 19j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Circular
Movement Setting: Lever
Plate: Full Plate
Double Roller: Yes
Regulator: Ball
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: Yes
U.S. Patents: D25695, 565955
Movement Markings: Official BofRT Standard
999
Ball Watch Co. Cleveland, O.
Adjusted
Double Roller.
Motor Barrel
19 Jewels
Sapphire Pallets
Safety Pinion
Trade Mark
Patented June 30'96
Pat.Aug.18'96.
Case: Various
Database Version: v52.270
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
13.24
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
100.00
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.814%
Registry Population: 2 (1.14%)

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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.


Andrew9000 85 · July 25, 2023

Serial Number 642700 was reported as accurate.

Durant1 39 · October 20, 2022

Serial Number 642723 was reported as accurate.

Anonymous · May 27, 2021

Serial Number 642719 was reported as accurate.

Anonymous · September 25, 2018

Serial Number 642734 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · February 27, 2018

Serial Number 642719 was reported as accurate.

Anonymous · November 16, 2016

Serial Number 642637 was reported as accurate.

bwalder 137 · August 24, 2016

Serial Number 642611 was reported as inaccurate.

Note: Movement markings are BRT