Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999N

Manufacturer: Ball - Hamilton
Movement Serial Number: B603686
Grade: 999N
Model: 1
Estimated Production Year: 1920
Run Quantity: 400
Grade/Model Run: 2 of 7
Grade/Model Total Production: 5,700
Size: 16s
Jewels: 23j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Barrel: Motor
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: Yes
U.S. Patents: D32330
Case: Various
Database Version: v52.245
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
17.16
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
129.58
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
4.941%
Registry Population: 2 (0.50%)
Research Note: Gold RR Seal, Ball Patent Hairspring Stud

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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.


Anonymous · October 17, 2021

Serial Number B603470 was reported as accurate.

Anonymous · March 31, 2021

Serial Number B603588 was reported as accurate.

Changes since this report was submitted:
Grade changed from 999m to 999n

Anonymous · December 31, 2020

Serial Number B603406 was reported as accurate.

Anonymous · February 7, 2020

Serial Number B603688 was reported as accurate.

Changes since this report was submitted:
Grade changed from 999m to 999n

Anonymous · April 10, 2019

Serial Number B603577 was reported as accurate.

Changes since this report was submitted:
Grade changed from 999m to 999n

WLBelkriver33 804 · March 31, 2019

Serial Number B603577 was reported as accurate.

Changes since this report was submitted:
Grade changed from 999m to 999n

Anonymous · July 7, 2018

Serial Number B603468 was reported as accurate.

Joerealtor 74 · February 16, 2018

Serial Number B603686 was reported as inaccurate.

Note: the watch is marked 23 Jewels, see photo attached
Changes since this report was submitted:
Grade changed from 999m to 999n
Jewels changed from 21j to 23j

Anonymous · September 22, 2017

Serial Number B603613 was reported as inaccurate.

Note: 23 jewels
Changes since this report was submitted:
Grade changed from 999m to 999n
Jewels changed from 21j to 23j

bile0321 21 · August 11, 2017

Serial Number B603551 was reported as inaccurate.

Note: serial number b603551 is 23j
Changes since this report was submitted:
Grade changed from 999m to 999n
Jewels changed from 21j to 23j

DSpall 6 · December 19, 2016

Serial Number B603472 was reported as inaccurate.

Note: 23j not 21j
Changes since this report was submitted:
Jewels changed from 21j to 23j

Anonymous · May 9, 2016

Serial Number B603498 was reported as inaccurate.

Note: 23 jewels
Changes since this report was submitted:
Jewels changed from 21j to 23j

dfchong 837 · May 7, 2016

Serial Number B603498 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 21j to 23j

Anonymous · April 14, 2016

Serial Number B603334 was reported as inaccurate.

Note: this is a 23j movement
Changes since this report was submitted:
Jewels changed from 21j to 23j

KennethRSloan 3 · October 20, 2015

Serial Number B603619 was reported as accurate.

Vcanejr 5 · August 2, 2015

Serial Number B603603 was reported as accurate.

Anonymous · October 1, 2014

Serial Number B603619 was reported as accurate.

pdecesare 6 · August 1, 2014

Serial Number B603466 was reported as accurate.