Pocket Watch Database

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

Ball - Hamilton

Grade: 999B

Manufacturer: Ball - Hamilton
Movement Serial Number: 28205
Grade: 999B
Model: 1
Estimated Production Year: 1898
Run Quantity: 120
Grade/Model Run: 9 of 21
Grade/Model Total Production: 3,300
Size: 18s
Jewels: 17j
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: D26267, 565955, D24446
Movement Markings: Official RR Standard
Ball & Co. Cleveland.
Adjusted
17 Jewels
Sapphire Pallets
Safety Pinion
Trade Mark
Patented Nov.17.96
Pat.Aug18'96
Case: Various
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
9.88
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
74.97
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.861%
Registry Population: 1 (0.83%)
Research Note: Patented Pierced "Balloon" Hands. , “Patented” on Barrel Bridge

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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.


jacobwalls07 143 · October 19, 2018

Serial Number 28205 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Full
Ball - Hamilton Grade 999B Pocket Watch