Ball - Waltham Pocket Watch: Serial Number B257523 (Grade Official Standard)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/ball-waltham/B257523/link

Access Date: April 18, 2024

From the American Horology Archive:

Ball - Waltham

Grade: Official Standard

Manufacturer:	Ball - Waltham
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	B257523
Grade:	Official Standard
Model:	1899
Estimated Production Year:	1915
Run Quantity:	500
Grade/Model Total Production:	71,861
Size:	16s
Jewels:	21j
Jewel Setting:	Gold Settings (Screw-Set)
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Circular
Movement Setting:	Lever
Plate:	3/4 Plate
Regulator:	Reed
Hairspring:	Breguet
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	5
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Railroad Grade:	Yes
Railroad Grade Classification:	Class A
U.S. Patents:	D26267, D32330
Movement Markings:	Official RR Standard Ball Watch Co. Cleveland, O. 21 Jewels Adjusted 5 Positions Sapphire Pallets Trade Mark Pat.Nov.17.96
Case:	Various
Database Version:	v52.235
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	213.95
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	1,381.31
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	75.276%
Registry Population:	4 (0.80%)
Research Note: #B257523: 21j; Corresponds to Waltham Serial run starting with #20,257,501

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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.