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: 392978
Grade: 990
Model: 1
Estimated Production Year: 1907
Run Quantity: 200
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: 6 (3.00%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 392854 #54 Marketplace May 02, 2014
2 392863 #63 Collection March 04, 2020
3 392918 #118 Inferred
4 392966 #166 Collection August 26, 2014
5 392978 #178 Collection January 11, 2022
6 392998 #198 Marketplace November 21, 2013
Standard Deviation of Known Examples: 61.04 (Expected: 57.88, Δ3.16/1.58%)

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Data Verification Reports

392801
Verification Serial Map
393000

Anonymous · April 12, 2020

Serial Number 392978 was reported as accurate.

Anonymous · October 8, 2019

Serial Number 392942 was reported as accurate.

Anonymous · September 14, 2017

Serial Number 392953 was reported as accurate.

Anonymous · September 11, 2017

Serial Number 392953 was reported as accurate.

Anonymous · August 24, 2017

Serial Number 392953 was reported as accurate.

Gimparoo Supporter 703 · May 2, 2014

Serial Number 392854 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No
Hamilton Grade 990 Pocket Watch