Ball Pocket Watch: Serial Number B228730 (Grade Official Standard)

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/ball/B228730

Access Date: April 20, 2024

From the American Horology Archive:

Ball - Waltham

Grade: Official Standard

Manufacturer:	Ball - Waltham
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	B228730
Grade:	Official Standard
Model:	1899
Estimated Production Year:	1900
Run Quantity:	300
Grade/Model Run:	55 of 107
Grade/Model Total Production:	71,861
Size:	16s
Jewels:	19j
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:	D32330
Case:	Various
Database Version:	v52.241
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%
Research Note: Corresponds to Waltham Serial run starting with #15,228,601

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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.