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: 509884
Grade: 940
Model: 1
Estimated Production Year: 1906
Run Quantity: 900
Total Production: 210,596
Size: 18s
Jewels: 21j
Jewel Material: Ruby
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Two-Tone
Finish Pattern: Damaskeened
Movement Inlay Color: Gilt
Movement Setting: Lever
Plate: Full Plate
Barrel: Going
Regulator: Micrometer
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: #509884 Verified as Two-Tone, #509684 Reported as Two-Tone

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Data Verification Reports

509001
Verification Serial Map
509900

Anonymous · September 1, 2020

Serial Number 509439 was reported as accurate.

WLBelkriver33 804 · March 13, 2019

Serial Number 509810 was reported as accurate.

cmdraven 2858 · March 9, 2019

Serial Number 509810 was reported as accurate.

Gimparoo 694 · October 16, 2017

Serial Number 509884 was reported as accurate.

dfchong 834 · October 1, 2017

Serial Number 509475 was reported as accurate.

Anonymous · September 1, 2017

Serial Number 509275 was reported as accurate.

von1943 357 · February 26, 2017

Serial Number 509324 was reported as accurate.

Anonymous · March 2, 2016

Serial Number 509844 was reported as accurate.

Anonymous · October 27, 2015

Serial Number 509684 was reported as inaccurate.

Note: 2 tone damascene movement.
Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone

Anonymous · September 4, 2015

Serial Number 509194 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone
Hamilton Grade 940 Pocket Watch Movement
Hamilton Grade 940 Pocket Watch Movement