Pocket Watch Database

From the American Horology Archive:
Ball - Hamilton Grade 999A Pocket Watch

Ball - Hamilton

Grade: 999A

Manufacturer: Ball - Hamilton Question Mark
Movement Serial Number: 644245 Question Mark
Grade: 999A Question Mark
Model: 1 Question Mark
Estimated Production Year: 1910 Question Mark
Run Quantity: 100 Question Mark
Grade/Model Run: 24 of 25 Question Mark
Grade/Model Total Production: 14,000 Question Mark
Size: 18s Question Mark
Jewels: 21j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: “Sun-burst” Damascening Question Mark
Movement Setting: Lever Question Mark
Plate: Full Plate Question Mark
Double Roller: Yes Question Mark
Regulator: Ball Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Railroad Grade: Yes Question Mark
Movement Markings: Official RR Standard or Brotherhood Markings
Case: Various Question Mark
Database Version: v52.431 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
42.15 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
318.43 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
12.136% Question Mark
Registry Population:
Scoped for This Run Only
2 (2.00%) Question Mark
Research Note: Hamilton Hairspring Stud

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

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 30, 2018

Serial Number 644224 was reported as accurate.

TridentineCatholic 25 · January 30, 2015

Serial Number 644259 was reported as accurate.

Anonymous · December 30, 2014

Serial Number 644247 was reported as accurate.

Ball - Hamilton Grade 999A Pocket Watch