Pocket Watch Database

From the American Horology Archive:
Hamilton Grade 990 Pocket Watch

Hamilton Watch Co.

Grade: 990

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 839746
Grade: 990
Model: 1
Estimated Production Year: 1911
Run Quantity: 300
Total Production: 12,599
Size: 16s
Jewels: 21j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
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: 7.6, 21.8, 38.0, 50.5
Hamilton 16s Dial Feet Research
Data Research: 1953 Hamilton Serial List
Case: Various
Registry Population: 10 (3.33%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 839729 #29 Marketplace September 01, 2022
2 839746 #46 Collection September 12, 2020
3 839760 #60 Marketplace August 06, 2021
4 839765 #65 Collection September 27, 2018
5 839778 #78 Marketplace June 15, 2017
6 839854 #154 Marketplace October 06, 2021
7 839878 #178 Inferred
8 839894 #194 Collection March 12, 2015
9 839905 #205 Marketplace August 30, 2021
10 839934 #234 Inferred
Standard Deviation of Known Examples: 76.14 (Expected: 86.75, Δ10.61/3.54%)

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Data Verification Reports

839701
Verification Serial Map
840000

Rikuo1357 9 · September 8, 2022

Serial Number 839729 was reported as accurate.

dstuartblue 17 · November 24, 2020

Serial Number 839840 was reported as accurate.

Johnmckenzie 1 · June 21, 2020

Serial Number 839878 was reported as accurate.

AntiqueMan7 11 · November 4, 2018

Serial Number 839765 was reported as accurate.

Anonymous · January 17, 2018

Serial Number 839870 was reported as accurate.

Anonymous · January 5, 2018

Serial Number 839870 was reported as accurate.

Gimparoo Supporter 703 · June 15, 2017

Serial Number 839778 was reported as accurate.

Anonymous · August 12, 2015

Serial Number 839870 was reported as accurate.

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

Anonymous · April 22, 2014

Serial Number 839713 was reported as accurate.

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

Anonymous · April 10, 2014

Serial Number 839899 was reported as accurate.

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

LordDewi 1 · March 11, 2014

Serial Number 839899 was reported as accurate.

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

Anonymous · January 24, 2013

Serial Number 839870 was reported as accurate.

Anonymous · May 14, 2012

Serial Number 839883 was reported as accurate.

Anonymous · May 13, 2012

Serial Number 839883 was reported as accurate.

Hamilton Grade 990 Pocket Watch