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: 350281
Grade: 990
Model: 1
Estimated Production Year: 1906
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: 8 (2.67%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 350016 #16 Collection February 23, 2019
2 350035 #35 Collection August 02, 2016
3 350159 #159 Marketplace February 10, 2013
4 350264 #264 Inferred
5 350269 #269 Marketplace October 17, 2015
6 350281 #281 Collection April 21, 2017
7 350288 #288 Collection January 29, 2019
8 350299 #299 Marketplace January 11, 2015
Standard Deviation of Known Examples: 116.93 (Expected: 86.75, Δ30.18/10.06%)

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Data Verification Reports

350001
Verification Serial Map
350300

ebsrods Supporter 61 · November 4, 2017

Serial Number 350281 was reported as accurate.

MichaelB 150 · April 21, 2017

Serial Number 350281 was reported as accurate.

Anonymous · November 24, 2015

Serial Number 350029 was reported as accurate.

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

Anonymous · September 16, 2014

Serial Number 350205 was reported as accurate.

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

Anonymous · November 5, 2012

Serial Number 350213 was reported as accurate.

Anonymous · September 13, 2012

Serial Number 350288 was reported as accurate.

Anonymous · June 20, 2012

Serial Number 350252 was reported as accurate.

Hamilton Grade 990 Pocket Watch