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: 850309
Grade: 990
Model: 1
Estimated Production Year: 1912
Run Quantity: 500
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: 22.3, 38.0, 57.1
Hamilton 16s Dial Feet Research
Data Research: 1953 Hamilton Serial List
Case: Various
Database Version: v48.489

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

850301
Verification Serial Map
850800

rmwatchandclock Supporter 266 · August 31, 2022

Serial Number 850717 was reported as accurate.

Anonymous · March 15, 2021

Serial Number 850664 was reported as accurate.

Anonymous · August 3, 2020

Serial Number 850329 was reported as accurate.

Anonymous · February 9, 2019

Serial Number 850308 was reported as accurate.

Anonymous · January 19, 2019

Serial Number 850513 was reported as accurate.

Anonymous · January 14, 2017

Serial Number 850528 was reported as accurate.

Anonymous · November 24, 2016

Serial Number 850696 was reported as accurate.

Anonymous · November 5, 2016

Serial Number 850652 was reported as accurate.

daddo46 982 · November 1, 2016

Serial Number 850696 was reported as accurate.

Anonymous · January 4, 2015

Serial Number 850457 was reported as accurate.

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

Firebirdjeff 41 · September 26, 2014

Serial Number 850793 was reported as accurate.

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

Anonymous · January 26, 2014

Serial Number 850527 was reported as accurate.

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

Anonymous · October 6, 2013

Serial Number 850370 was reported as accurate.

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

Anonymous · March 25, 2013

Serial Number 850527 was reported as inaccurate.

Note: 3/4 plate
Changes since this report was submitted:
Plate changed from Unknown to 3/4

Anonymous · February 23, 2013

Serial Number 850527 was reported as accurate.

Anonymous · January 12, 2013

Serial Number 850719 was reported as accurate.

Hamilton Grade 990 Pocket Watch