Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999P

Manufacturer: Ball - Hamilton
Movement Serial Number: B640864
Grade: 999P
Model: 1
Estimated Production Year: 1934
Run Quantity: 4,000
Grade/Model Run: 11 of 15
Grade/Model Total Production: 40,300
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Circular
Movement Setting: Lever
Plate: 3/4 Plate
Barrel: Going
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: Yes
U.S. Patents: D32330
Movement Markings: Official Standard
Ball Watch Co.
Cleveland,O.
21 Jewels
Adjusted
5 Positions
Sapphire Pallets
Trade Mark
Case: Various
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
120.66
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
916.84
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
34.934%
Registry Population: 10 (0.25%)
Research Note: Hamilton Hairspring Stud

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Does this information describe your movement accurately?

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 · March 1, 2024

Serial Number B642854 was reported as accurate.

2mnyboxers Supporter 398 · February 11, 2023

Serial Number B642833 was reported as accurate.

Anonymous · January 9, 2023

Serial Number B641466 was reported as accurate.

Anonymous · March 8, 2022

Serial Number B642700 was reported as accurate.

Anonymous · November 16, 2021

Serial Number B642383 was reported as accurate.

Anonymous · September 20, 2021

Serial Number B640813 was reported as accurate.

mdmiller99 Supporter 33 · September 11, 2021

Serial Number B642356 was reported as accurate.

WatchingU 9 · August 27, 2021

Serial Number B643659 was reported as accurate.

mdmiller99 Supporter 33 · July 18, 2021

Serial Number B642356 was reported as accurate.

clockingscotty 108 · June 30, 2021

Serial Number B641010 was reported as accurate.

Anonymous · June 7, 2021

Serial Number B640218 was reported as accurate.

Anonymous · May 31, 2021

Serial Number B643657 was reported as accurate.

Anonymous · May 12, 2021

Serial Number B642356 was reported as accurate.

Anonymous · April 6, 2021

Serial Number B642388 was reported as accurate.

Anonymous · February 17, 2021

Serial Number B642274 was reported as accurate.

Anonymous · December 27, 2020

Serial Number B640465 was reported as accurate.

Anonymous · December 26, 2020

Serial Number B640753 was reported as accurate.

Anonymous · October 14, 2020

Serial Number B640373 was reported as accurate.

Anonymous · March 4, 2020

Serial Number B641735 was reported as accurate.

Anonymous · February 7, 2020

Serial Number B640993 was reported as accurate.

Anonymous · January 28, 2020

Serial Number B642211 was reported as accurate.

Anonymous · April 10, 2019

Serial Number B643844 was reported as accurate.

Anonymous · March 30, 2019

Serial Number B643469 was reported as accurate.

Anonymous · September 30, 2018

Serial Number B643939 was reported as accurate.

Anonymous · September 23, 2018

Serial Number B643939 was reported as accurate.

Anonymous · August 23, 2018

Serial Number B642734 was reported as accurate.

Anonymous · August 11, 2018

Serial Number B641713 was reported as inaccurate.

Note: Ball Watch Company Cleveland
Larger than size 16
16 Jewels
Patent Nov 17.98

andtohellwesail 3 · August 10, 2018

Serial Number B641542 was reported as inaccurate.

Note: B641542 is a 16j hunter configuration, stamped
commercial standard.

Anonymous · July 19, 2018

Serial Number B643713 was reported as accurate.

cmdraven 3970 · May 26, 2018

Serial Number B642872 was reported as accurate.

Anonymous · May 23, 2018

Serial Number B640732 was reported as accurate.

tav396 44 · April 7, 2018

Serial Number B643276 was reported as accurate.

Anonymous · April 2, 2018

Serial Number B643855 was reported as accurate.

Anonymous · March 30, 2018

Serial Number B643855 was reported as accurate.

Anonymous · March 18, 2018

Serial Number B643855 was reported as accurate.

Anonymous · February 21, 2018

Serial Number B641988 was reported as accurate.

Anonymous · December 3, 2017

Serial Number B642752 was reported as accurate.

Anonymous · November 12, 2017

Serial Number B641988 was reported as accurate.

Anonymous · October 14, 2017

Serial Number B643128 was reported as accurate.

Anonymous · August 9, 2017

Serial Number B641762 was reported as accurate.

Anonymous · June 24, 2017

Serial Number B641522 was reported as accurate.

Anonymous · January 25, 2017

Serial Number B642084 was reported as accurate.

JPALAZZO 14 · July 16, 2016

Serial Number B643023 was reported as accurate.

Anonymous · March 18, 2016

Serial Number B641319 was reported as accurate.

Anonymous · March 6, 2016

Serial Number B641319 was reported as accurate.

Anonymous · February 27, 2016

Serial Number B641274 was reported as accurate.

Anonymous · January 16, 2016

Serial Number B642840 was reported as accurate.

Anonymous · January 3, 2016

Serial Number B640375 was reported as accurate.

daddo46 991 · December 4, 2015

Serial Number B641868 was reported as accurate.

Anonymous · August 23, 2015

Serial Number B640378 was reported as accurate.