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: 648987
Grade: 940
Model: 1
Estimated Production Year: 1910
Run Quantity: 1,000
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
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: 19 (1.90%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 648011 #11 Marketplace December 05, 2019
2 648017 #17 Marketplace September 10, 2013
3 648167 #167 Marketplace January 31, 2022
4 648199 #199 Marketplace November 03, 2018
5 648230 #230 Marketplace October 22, 2017
6 648301 #301 Marketplace June 25, 2017
7 648385 #385 Marketplace October 19, 2013
8 648451 #451 Collection March 13, 2014
9 648483 #483 Inferred
10 648500 #500 Collection February 11, 2020
11 648524 #524 Inferred
12 648580 #580 Marketplace September 15, 2013
13 648686 #686 Marketplace November 21, 2013
14 648716 #716 Collection March 13, 2018
15 648853 #853 Inferred
16 648962 #962 Marketplace January 07, 2018
17 648986 #986 Inferred
18 648987 #987 Collection June 14, 2019
19 648999 #999 Marketplace June 15, 2015
Standard Deviation of Known Examples: 327.94 (Expected: 288.82, Δ39.12/3.91%)

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Data Verification Reports

648001
Verification Serial Map
649000

Anonymous · May 6, 2022

Serial Number 648550 was reported as accurate.

Anonymous · April 10, 2021

Serial Number 648317 was reported as accurate.

Anonymous · March 20, 2021

Serial Number 648665 was reported as accurate.

733harry 30 · October 16, 2020

Serial Number 648524 was reported as accurate.

Anonymous · October 7, 2020

Serial Number 648725 was reported as accurate.

giddykippa 231 · September 13, 2020

Serial Number 648665 was reported as accurate.

Anonymous · December 5, 2019

Serial Number 648011 was reported as accurate.

hossners Supporter 14 · July 2, 2019

Serial Number 648987 was reported as accurate.

Anonymous · November 11, 2017

Serial Number 648259 was reported as accurate.

manoutoftime 1 · October 9, 2017

Serial Number 648524 was reported as accurate.

manoutoftime 1 · October 8, 2017

Serial Number 648524 was reported as accurate.

Anonymous · July 19, 2017

Serial Number 648815 was reported as accurate.

Anonymous · July 19, 2017

Serial Number 648815 was reported as accurate.

Anonymous · October 6, 2016

Serial Number 648534 was reported as accurate.

Gasperoff 727 · April 25, 2015

Serial Number 648691 was reported as accurate.

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

Gasperoff 727 · April 16, 2015

Serial Number 648691 was reported as accurate.

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

Gasperoff 727 · March 23, 2015

Serial Number 648691 was reported as accurate.

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

Anonymous · February 19, 2015

Serial Number 648418 was reported as accurate.

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

jpugh1157 5 · March 13, 2014

Serial Number 648451 was reported as accurate.

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

Anonymous · January 31, 2014

Serial Number 648451 was reported as accurate.

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

Anonymous · August 21, 2013

Serial Number 648985 was reported as accurate.

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

Dch525 25 · July 10, 2013

Serial Number 648048 was reported as accurate.

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

Anonymous · March 14, 2013

Serial Number 648164 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