Ball - Hamilton Pocket Watch: Serial Number 90487 (Grade 999E)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/ball-hamilton/90487/movement

Access Date: December 21, 2024

From the American Horology Archive:

Ball - Hamilton

Grade: 999E

Manufacturer:	Ball - Hamilton
Movement Serial Number:	90487
Grade:	999E
Model:	1
Estimated Production Year:	1899
Run Quantity:	350
Grade/Model Run:	2 of 6
Grade/Model Total Production:	1,450
Size:	18s
Jewels:	17j
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Circular
Movement Setting:	Lever
Plate:	Full Plate
Regulator:	Ball
Adjusted:	Yes
Railroad Grade:	Yes
U.S. Patents:	D25695, 565955
Movement Markings:	Official RR Standard Ball & Co. Cleveland. Adjusted [Some Marked "A" or "Single Roller"] 17 Jewels Sapphire Pallets Safety Pinion Trade Mark Patented June 30'96 Pat.Aug.18'96.
Case:	Various
Database Version:	v52.517
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	4.36
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	32.88
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	1.257%
Registry Population: Scoped for This Run Only	3 (0.86%)
Research Note: For use on RR with fewer requirements

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
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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.