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: 510009
Grade: 940
Model: 1
Estimated Production Year: 1906
Run Quantity: 1,500
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
Dial Feet Locations: 2.6, 18.0, 38.2
U.S. Patents: 832672, 427072
Data Research: 1953 Hamilton Serial List
Research Note: #510340 Verified as Marked "Special" with Two-Tone Plates.

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Data Verification Reports

510001
Verification Serial Map
511500

Anonymous · October 2, 2020

Serial Number 510356 was reported as inaccurate.

Note: #510356 two tone movement marked special

Anonymous · December 17, 2019

Serial Number 510382 was reported as accurate.

Anonymous · October 18, 2019

Serial Number 510098 was reported as accurate.

svenne 41 · January 30, 2019

Serial Number 510480 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Two-Tone to Nickel

Anonymous · August 11, 2018

Serial Number 510429 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Two-Tone to Nickel

Gimparoo 694 · April 25, 2018

Serial Number 510340 was reported as accurate.

Anonymous · March 13, 2018

Serial Number 510340 was reported as accurate.

Anonymous · January 18, 2018

Serial Number 510764 was reported as inaccurate.

No further details were submitted with the report.

Jneuman 1 · September 27, 2017

Serial Number 510098 was reported as accurate.

Anonymous · April 24, 2017

Serial Number 510816 was reported as accurate.

Anonymous · January 16, 2017

Serial Number 510087 was reported as accurate.

Anonymous · February 13, 2016

Serial Number 511334 was reported as accurate.

Bluejay 171 · January 11, 2016

Serial Number 511469 was reported as accurate.

Anonymous · May 26, 2015

Serial Number 510135 was reported as accurate.

oetzipapa 16 · December 9, 2014

Serial Number 510619 was reported as accurate.

Anonymous · November 22, 2014

Serial Number 510597 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · November 18, 2014

Serial Number 510619 was reported as accurate.

ReneeInReno 9 · August 23, 2014

Serial Number 510525 was reported as accurate.

Anonymous · August 10, 2014

Serial Number 510619 was reported as accurate.

69abody 166 · October 22, 2013

Serial Number 510595 was reported as accurate.

TheAdmiral 93 · June 23, 2013

Serial Number 510612 was reported as accurate.

Anonymous · August 1, 2012

Serial Number 510612 was reported as accurate.

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