Pocket Watch Database

From the American Horology Archive:
Hamilton Grade 990 Pocket Watch

Hamilton Watch Co.

Grade: 990

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 342299
Grade: 990
Model: 1
Estimated Production Year: 1906
Run Quantity: 300
Total Production: 12,599
Size: 16s
Jewels: 21j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Dial Feet Locations: 7.6, 21.8, 38.0, 50.5
Hamilton 16s Dial Feet Research
Data Research: 1953 Hamilton Serial List
Case: Various
Registry Population: 9 (3.00%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 342011 #11 Marketplace December 20, 2019
2 342032 #32 Marketplace March 08, 2020
3 342052 #52 Marketplace February 07, 2018
4 342134 #134 Inferred
5 342143 #143 Marketplace February 28, 2017
6 342210 #210 Marketplace September 03, 2021
7 342237 #237 Marketplace February 22, 2021
8 342297 #297 Collection March 24, 2016
9 342299 #299 Collection April 30, 2017
Standard Deviation of Known Examples: 110.49 (Expected: 86.75, Δ23.74/7.91%)

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Data Verification Reports

342001
Verification Serial Map
342300

Anonymous · August 3, 2022

Serial Number 342049 was reported as accurate.

Anonymous · June 11, 2022

Serial Number 342147 was reported as accurate.

Anonymous · August 24, 2021

Serial Number 342210 was reported as accurate.

Anonymous · February 17, 2021

Serial Number 342237 was reported as accurate.

Anonymous · October 26, 2019

Serial Number 342261 was reported as accurate.

MichaelB 150 · April 30, 2017

Serial Number 342299 was reported as accurate.

Anonymous · July 19, 2014

Serial Number 342297 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · February 28, 2014

Serial Number 342070 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · May 1, 2013

Serial Number 342108 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Plate changed from Unknown to 3/4
Hamilton Grade 990 Pocket Watch