Pocket Watch Database

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

Hamilton Watch Co.

Grade: 940

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 666338
Grade: 940
Model: 1
Estimated Production Year: 1910
Run Quantity: 1,000
Grade/Model 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
Double Roller: Yes
Barrel: Motor
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
Case: Various
Registry Population: 14 (1.40%)
Database Version: v49.712

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 666257 #257 Marketplace February 16, 2020
2 666271 #271 Marketplace November 23, 2017
3
Image Credit: Scuba75
666338 #338 Collection September 29, 2019
4 666340 #340 Marketplace December 16, 2015
5 666347 #347 Marketplace June 25, 2022
6 666411 #411 Collection October 22, 2022
7 666449 #449 Inferred
8 666480 #480 Inferred
9 666521 #521 Marketplace June 27, 2017
10 666532 #532 Marketplace June 03, 2016
11 666542 #542 Marketplace November 07, 2016
12 666575 #575 Marketplace March 17, 2013
13 666847 #847 Marketplace March 12, 2017
14 666933 #933 Marketplace November 15, 2014
Standard Deviation of Known Examples: 198.58 (Expected: 288.82, Δ90.24/9.02%)

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Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.


Anonymous · November 4, 2022

Serial Number 666076 was reported as accurate.

Anonymous · February 15, 2022

Serial Number 666342 was reported as accurate.

Anonymous · May 25, 2021

Serial Number 666945 was reported as accurate.

Anonymous · February 15, 2020

Serial Number 666257 was reported as accurate.

Anonymous · December 18, 2019

Serial Number 666683 was reported as accurate.

Anonymous · October 5, 2019

Serial Number 666127 was reported as accurate.

Anonymous · July 23, 2019

Serial Number 666504 was reported as accurate.

Anonymous · March 29, 2019

Serial Number 666502 was reported as accurate.

Anonymous · October 13, 2018

Serial Number 666175 was reported as accurate.

Gimparoo Supporter 703 · September 30, 2018

Serial Number 666175 was reported as accurate.

Anonymous · April 13, 2018

Serial Number 666095 was reported as accurate.

Anonymous · December 30, 2017

Serial Number 666069 was reported as accurate.

Anonymous · October 5, 2017

Serial Number 666619 was reported as accurate.

Anonymous · August 16, 2017

Serial Number 666480 was reported as accurate.

spunkeanie 6 · March 25, 2017

Serial Number 666823 was reported as accurate.

Anonymous · March 25, 2017

Serial Number 666823 was reported as accurate.

Anonymous · March 11, 2017

Serial Number 666847 was reported as accurate.

Anonymous · January 12, 2015

Serial Number 666683 was reported as accurate.

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

Anonymous · December 10, 2014

Serial Number 666959 was reported as accurate.

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

Anonymous · October 30, 2014

Serial Number 666338 was reported as accurate.

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

Anonymous · August 5, 2014

Serial Number 666604 was reported as accurate.

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

Anonymous · May 10, 2014

Serial Number 666839 was reported as accurate.

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

Anonymous · May 8, 2014

Serial Number 666839 was reported as accurate.

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

Anonymous · May 8, 2014

Serial Number 666839 was reported as accurate.

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

Anonymous · June 19, 2013

Serial Number 666911 was reported as accurate.

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

Anonymous · April 1, 2013

Serial Number 666164 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from No to Yes
Hamilton Grade 940 Pocket Watch
Hamilton Grade 940 Pocket Watch