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: 508008
Grade: 940
Model: 1
Estimated Production Year: 1906
Run Quantity: 2,000
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
Dial Feet Locations: 2.6, 18.0, 38.2
U.S. Patents: 832672, 427072
Data Research: 1953 Hamilton Serial List

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Data Verification Reports

507001
Verification Serial Map
509000

Anonymous · February 21, 2020

Serial Number 508438 was reported as accurate.

Anonymous · December 1, 2018

Serial Number 508362 was reported as accurate.

Anonymous · March 30, 2018

Serial Number 508232 was reported as accurate.

Deere51 102 · February 6, 2018

Serial Number 508527 was reported as accurate.

Deere51 102 · January 29, 2018

Serial Number 508527 was reported as accurate.

Anonymous · January 26, 2018

Serial Number 508527 was reported as accurate.

Anonymous · October 14, 2017

Serial Number 508435 was reported as accurate.

Anonymous · January 12, 2017

Serial Number 508730 was reported as accurate.

Anonymous · January 11, 2017

Serial Number 508739 was reported as accurate.

Anonymous · June 5, 2015

Serial Number 507272 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · April 18, 2015

Serial Number 508216 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · September 7, 2013

Serial Number 508117 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · May 18, 2013

Serial Number 508364 was reported as inaccurate.

Note: Should be a grade 940 lever set.
Changes since this report was submitted:
Grade changed from 999 to 940
Size changed from 16 to 18
Factory Model changed from 0 to 1
Adjusted # Positions changed from 6 to 5

Anonymous · May 3, 2013

Serial Number 508364 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Grade changed from 999 to 940
Size changed from 16 to 18
Factory Model changed from 0 to 1
Adjusted # Positions changed from 6 to 5

Anonymous · April 9, 2013

Serial Number 508364 was reported as inaccurate.

Note: #508364 is an 18s 940 17j adjusted (3 positions)
full plate watch, not a 999 Ball. Info. from
Hamilton ledgers at NAWCC.
Changes since this report was submitted:
Grade changed from 999 to 940
Size changed from 16 to 18
Factory Model changed from 0 to 1
Adjusted # Positions changed from 6 to 5

Anonymous · May 25, 2012

Serial Number 508675 was reported as inaccurate.

Note: Hamilton 940, 21 jewels, lever set, railroad
grade. Made in 1906, based on IHC185 list:
http://library.ihc185.com/catalogs/gelson/Image10.
jpg.
Changes since this report was submitted:
Grade changed from 999 to 940
Size changed from 16 to 18
Factory Model changed from 0 to 1
Railroad Grade changed from No to Yes
Plate changed from Unknown to Full
Hamilton Grade 940 Pocket Watch Movement
Hamilton Grade 940 Pocket Watch Movement