Pocket Watch Database

From the American Horology Archive:

Ball - Hamilton

Grade: 999P

Manufacturer: Ball - Hamilton Question Mark
Movement Serial Number: B631747 Question Mark
Grade: 999P Question Mark
Model: 1 Question Mark
Estimated Production Year: 1928 Question Mark
Run Quantity: 4,000 Question Mark
Grade/Model Run: 7 of 15 Question Mark
Grade/Model Total Production: 40,300 Question Mark
Size: 16s Question Mark
Jewels: 21j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Circular Question Mark
Movement Setting: Lever Question Mark
Plate: 3/4 Plate Question Mark
Barrel: Going Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Railroad Grade: Yes Question Mark
U.S. Patents: D32330 Question Mark
Movement Markings: Official Standard
Ball Watch Co.
Cleveland,O.
21 Jewels
Adjusted
5 Positions
Sapphire Pallets
Trade Mark
Case: Various Question Mark
Database Version: v52.428 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
121.33 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
916.84 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
34.934% Question Mark
Registry Population:
Scoped for This Run Only
14 (0.35%) Question Mark
Research Note: Hamilton Hairspring Stud

Help Us Help Others By Improving the Database:

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 371 · 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 143 · 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 644 · 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 36 · 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.