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: 380960
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 380817 #17 Marketplace January 31, 2020
2 380818 #18 Inferred
3 380845 #45 Marketplace November 01, 2018
4 380850 #50 Marketplace March 28, 2014
5 380941 #141 Marketplace October 30, 2019
6 380960 #160 Collection October 25, 2017
Standard Deviation of Known Examples: 62.70 (Expected: 57.88, Δ4.82/2.41%)

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Data Verification Reports

380801
Verification Serial Map
381000

MichaelB 150 · October 25, 2017

Serial Number 380960 was reported as accurate.

Anonymous · September 12, 2017

Serial Number 380999 was reported as accurate.

Hamilton Grade 990 Pocket Watch