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: 385827
Grade: 990
Model: 1
Estimated Production Year: 1907
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: 6 (3.00%)
Database Version: v49.392

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 385827 #27 Collection December 29, 2017
2 385828 #28 Marketplace October 03, 2019
3 385835 #35 Marketplace July 19, 2018
4 385855 #55 Collection September 22, 2019
5 385867 #67 Marketplace November 08, 2013
6 385934 #134 Marketplace April 12, 2022
Standard Deviation of Known Examples: 40.63 (Expected: 57.88, Δ17.25/8.62%)

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Data Verification Reports

385801
Verification Serial Map
386000

Anonymous · September 29, 2020

Serial Number 385839 was reported as accurate.

Anonymous · July 24, 2020

Serial Number 385837 was reported as accurate.

Anonymous · July 13, 2020

Serial Number 385837 was reported as accurate.

Anonymous · September 13, 2019

Serial Number 385855 was reported as accurate.

swandawg 1 · July 12, 2014

Serial Number 385964 was reported as accurate.

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

Anonymous · July 11, 2014

Serial Number 385964 was reported as accurate.

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

Anonymous · February 24, 2013

Serial Number 385811 was reported as accurate.

Anonymous · February 17, 2013

Serial Number 385945 was reported as accurate.

Anonymous · December 7, 2012

Serial Number 385811 was reported as accurate.

Hamilton Grade 990 Pocket Watch