Pocket Watch Database

From the American Horology Archive:
Hamilton Grade 940 Pocket Watch Movement
Hamilton Grade 940 Pocket Watch Movement

Hamilton Watch Co.

Grade: 940

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 278882
Grade: 940
Model: 1
Estimated Production Year: 1903
Run Quantity: 1,000
Total Production: 210,596
Size: 18s
Jewels: 21j
Jewel Material: Ruby
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Damaskeened
Movement Inlay Color: Gilt
Movement Setting: Lever
Plate: Full Plate
Barrel: Going
Regulator: Goldthwait
Hairspring: Breguet
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
Railroad Grade Classification: Class A
Dial Feet Locations: 2.6, 18.0, 38.2
U.S. Patents: 832672, 427072
Data Research: 1953 Hamilton Serial List
Database Version: v47.470

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Data Verification Reports

278001
Verification Serial Map
279000

Anonymous · January 15, 2022

Serial Number 278590 was reported as accurate.

Anonymous · January 27, 2021

Serial Number 278404 was reported as inaccurate.

Note: This one is a two-tone movement.

kingtech 4 · December 28, 2020

Serial Number 278882 was reported as accurate.

Anonymous · August 10, 2020

Serial Number 278390 was reported as accurate.

Anonymous · July 17, 2020

Serial Number 278004 was reported as accurate.

Anonymous · May 24, 2020

Serial Number 278208 was reported as accurate.

Anonymous · July 8, 2019

Serial Number 278165 was reported as accurate.

Anonymous · March 22, 2019

Serial Number 278869 was reported as accurate.

Anonymous · January 11, 2019

Serial Number 278875 was reported as inaccurate.

No further details were submitted with the report.

drogers806 1 · May 14, 2018

Serial Number 278121 was reported as accurate.

Anonymous · January 11, 2018

Serial Number 278746 was reported as accurate.

Anonymous · November 17, 2017

Serial Number 278183 was reported as accurate.

Anonymous · March 2, 2017

Serial Number 278676 was reported as accurate.

cmdraven 3263 · November 23, 2016

Serial Number 278562 was reported as accurate.

Anonymous · August 4, 2016

Serial Number 278810 was reported as accurate.

Anonymous · January 1, 2015

Serial Number 278463 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · October 16, 2014

Serial Number 0278389 was reported as accurate.

JRN00498 1 · July 17, 2014

Serial Number 278862 was reported as accurate.

Anonymous · February 14, 2014

Serial Number 278007 was reported as accurate.

Anonymous · April 18, 2013

Serial Number 278152 was reported as accurate.

Hamilton Grade 940 Pocket Watch Movement
Hamilton Grade 940 Pocket Watch Movement