Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999P

Manufacturer: Ball - Hamilton
Movement Serial Number: B631747
Grade: 999P
Model: 1
Estimated Production Year: 1928
Run Quantity: 4,000
Grade/Model Run: 7 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: v52.221
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: 14 (0.35%)
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 · January 6, 2024

Serial Number B631191 was reported as accurate.

rmwatchandclock Supporter 365 · August 19, 2023

Serial Number B631501 was reported as accurate.

Anonymous · June 16, 2023

Serial Number B631616 was reported as accurate.

Anonymous · May 11, 2023

Serial Number B631616 was reported as accurate.

Anonymous · February 5, 2023

Serial Number B632766 was reported as accurate.

Anonymous · November 27, 2022

Serial Number B633461 was reported as accurate.

Anonymous · February 7, 2022

Serial Number B630531 was reported as accurate.

Anonymous · January 26, 2022

Serial Number B630531 was reported as accurate.

Anonymous · January 7, 2022

Serial Number B633562 was reported as accurate.

Anonymous · December 10, 2021

Serial Number B631028 was reported as accurate.

Anonymous · October 14, 2021

Serial Number B633613 was reported as accurate.

billreid 141 · September 7, 2021

Serial Number B630259 was reported as accurate.

Anonymous · September 1, 2021

Serial Number B632870 was reported as accurate.

Anonymous · August 24, 2021

Serial Number B630288 was reported as accurate.

Anonymous · August 9, 2021

Serial Number B630259 was reported as accurate.

avpalermo Supporter 568 · June 24, 2021

Serial Number B632956 was reported as accurate.

Anonymous · June 15, 2021

Serial Number B633155 was reported as accurate.

Anonymous · May 11, 2021

Serial Number B632399 was reported as accurate.

Anonymous · April 14, 2021

Serial Number B631874 was reported as accurate.

Anonymous · March 21, 2021

Serial Number B632956 was reported as accurate.

Chronified Supporter 212 · January 9, 2021

Serial Number B632188 was reported as accurate.

Anonymous · November 26, 2020

Serial Number B631221 was reported as accurate.

Anonymous · November 19, 2020

Serial Number B630044 was reported as accurate.

Anonymous · November 17, 2020

Serial Number B632956 was reported as accurate.

Anonymous · November 11, 2020

Serial Number B632936 was reported as accurate.

Anonymous · November 2, 2020

Serial Number B632956 was reported as accurate.

Magman 5 · October 24, 2020

Serial Number B630115 was reported as accurate.

M119mm 2 · September 1, 2020

Serial Number B630007 was reported as accurate.

Anonymous · September 1, 2020

Serial Number B630007 was reported as accurate.

Magman 5 · July 15, 2020

Serial Number B630115 was reported as accurate.

Anonymous · July 13, 2020

Serial Number B630037 was reported as accurate.

Anonymous · May 28, 2020

Serial Number B632956 was reported as accurate.

Anonymous · February 1, 2020

Serial Number B631922 was reported as accurate.

CechBro Supporter 35 · December 31, 2019

Serial Number B630085 was reported as accurate.

Anonymous · November 17, 2019

Serial Number B632771 was reported as accurate.

Anonymous · October 28, 2019

Serial Number B630849 was reported as accurate.

Shazam 9 · October 21, 2019

Serial Number B632340 was reported as accurate.

Anonymous · September 24, 2019

Serial Number B632092 was reported as accurate.

Anonymous · September 24, 2019

Serial Number B631037 was reported as accurate.

Anonymous · September 3, 2019

Serial Number B630236 was reported as accurate.

Anonymous · August 16, 2019

Serial Number B633667 was reported as accurate.

texnet 684 · August 10, 2019

Serial Number B632047 was reported as accurate.

Anonymous · July 28, 2019

Serial Number B632458 was reported as accurate.

BobSchemel 8 · June 20, 2019

Serial Number B630115 was reported as accurate.

Anonymous · April 3, 2019

Serial Number B632249 was reported as inaccurate.

Note: According to the chart, the estimated production
year a B632249 was 1928. The inscription of my
grandfater's pocket watch has his name and the
year 1906.
Curator Response: Thanks for the report. It is possible the case originally housed a different movement.

WLBelkriver33 804 · March 12, 2019

Serial Number B632340 was reported as accurate.

Anonymous · March 6, 2019

Serial Number B631372 was reported as accurate.

Anonymous · March 6, 2019

Serial Number B631372 was reported as accurate.

Anonymous · February 9, 2019

Serial Number B631787 was reported as accurate.

Anonymous · January 11, 2019

Serial Number B633874 was reported as accurate.