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: 793857
Grade: 990
Model: 1
Estimated Production Year: 1911
Run Quantity: 200
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: 5 (2.50%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 793715 #15 Inferred
2 793754 #54 Collection September 16, 2020
3 793798 #98 Marketplace November 06, 2020
4 793857 #157 Collection August 07, 2015
5 793889 #189 Marketplace March 20, 2022
Standard Deviation of Known Examples: 71.56 (Expected: 57.88, Δ13.68/6.84%)

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Data Verification Reports

793701
Verification Serial Map
793900

Anonymous · March 15, 2022

Serial Number 793889 was reported as accurate.

Rascal 2 · September 11, 2019

Serial Number 793857 was reported as accurate.

Anonymous · February 12, 2018

Serial Number 793894 was reported as accurate.

Anonymous · August 19, 2014

Serial Number 793797 was reported as accurate.

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

Anonymous · August 16, 2014

Serial Number 793747 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No
Hamilton Grade 990 Pocket Watch