Pocket Watch Database

From the American Horology Archive:
Ball - Hamilton Grade 999A Pocket Watch

Ball - Hamilton

Grade: 999A

Manufacturer: Ball - Hamilton
Movement Serial Number: 170781
Grade: 999A
Model: 1
Estimated Production Year: 1902
Run Quantity: 200
Grade/Model Run: 11 of 25
Grade/Model Total Production: 14,000
Size: 18s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: “Sun-burst” Damascening
Movement Setting: Lever
Plate: Full Plate
Double Roller: Yes
Regulator: Ball
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: Yes
Movement Markings: Official RR Standard or Brotherhood Markings
Case: Various
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
41.91
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
318.43
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
12.136%
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 · October 17, 2020

Serial Number 170695 was reported as accurate.

Anonymous · March 7, 2019

Serial Number 170618 was reported as accurate.

Anonymous · April 29, 2016

Serial Number 170722 was reported as accurate.

Anonymous · June 25, 2014

Serial Number 170676 was reported as inaccurate.

Note: Not sure, however the movement (170676) is marked
adjusted not adjusted to 5 positions. I believe
later models of this watch had 5 positions marked
on the watch.
The particular movement in question is stem set
not lever set...again later models were lever set.
Thank you

Anonymous · June 25, 2014

Serial Number 170676 was reported as inaccurate.

Note: Not sure, however the movement (170676) is marked
adjusted not adjusted to 5 positions. I believe
later models of this watch had 5 positions marked
on the watch
Ball - Hamilton Grade 999A Pocket Watch