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: 644425
Grade: 940
Model: 1
Estimated Production Year: 1909
Run Quantity: 600
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: 13 (2.17%)
Database Version: v49.712

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1
Image Credit: netmind
644425 #25 Collection October 16, 2020
2 644439 #39 Marketplace August 13, 2013
3 644490 #90 Marketplace October 02, 2021
4 644532 #132 Marketplace March 10, 2019
5 644550 #150 Marketplace February 20, 2019
6 644634 #234 Inferred
7 644665 #265 Collection February 01, 2018
8 644742 #342 Marketplace June 23, 2018
9 644773 #373 Collection March 31, 2019
10 644812 #412 Marketplace February 26, 2015
11 644937 #537 Collection February 03, 2018
12 644958 #558 Marketplace December 26, 2019
13 644979 #579 Collection January 08, 2019
Standard Deviation of Known Examples: 196.28 (Expected: 173.35, Δ22.93/3.82%)

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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 · February 16, 2021

Serial Number 644566 was reported as accurate.

Anonymous · February 15, 2020

Serial Number 644958 was reported as accurate.

Anonymous · March 31, 2019

Serial Number 644773 was reported as accurate.

Anonymous · December 17, 2018

Serial Number 644779 was reported as accurate.

Anonymous · September 19, 2018

Serial Number 644722 was reported as accurate.

Anonymous · July 24, 2018

Serial Number 644742 was reported as accurate.

Waltham21j 121 · February 3, 2018

Serial Number 644937 was reported as accurate.

Anonymous · November 15, 2017

Serial Number 644425 was reported as accurate.

von1943 361 · September 27, 2017

Serial Number 644425 was reported as accurate.

von1943 361 · September 27, 2017

Serial Number 644425 was reported as accurate.

Anonymous · June 7, 2017

Serial Number 644425 was reported as accurate.

Anonymous · January 30, 2017

Serial Number 644924 was reported as accurate.

Anonymous · October 5, 2016

Serial Number 644411 was reported as accurate.

Anonymous · August 23, 2016

Serial Number 644609 was reported as accurate.

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

Gimparoo Supporter 703 · February 2, 2014

Serial Number 644924 was reported as accurate.

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

PGill34 60 · August 22, 2013

Serial Number 644618 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