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: 383426
Grade: 990
Model: 1
Estimated Production Year: 1907
Run Quantity: 399
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: 13 (3.26%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 383342 #42 Collection October 09, 2014
2 383386 #86 Collection September 14, 2019
3 383426 #126 Collection November 15, 2017
4 383451 #151 Marketplace April 13, 2017
5 383453 #153 Collection June 02, 2017
6 383509 #209 Marketplace July 07, 2013
7 383524 #224 Collection October 20, 2021
8 383529 #229 Inferred
9 383572 #272 Inferred
10 383616 #316 Collection September 27, 2016
11 383617 #317 Marketplace January 31, 2014
12 383641 #341 Inferred
13 383680 #380 Marketplace September 06, 2016
Standard Deviation of Known Examples: 103.88 (Expected: 115.33, Δ11.44/2.87%)

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

383301
Verification Serial Map
383699

Anonymous · June 15, 2021

Serial Number 383699 was reported as accurate.

Anonymous · March 27, 2021

Serial Number 383641 was reported as accurate.

danswatch 2 · April 11, 2020

Serial Number 383386 was reported as accurate.

Anonymous · April 30, 2019

Serial Number 383617 was reported as accurate.

Anonymous · July 6, 2018

Serial Number 383369 was reported as accurate.

MichaelB 150 · November 15, 2017

Serial Number 383426 was reported as accurate.

Anonymous · November 15, 2017

Serial Number 383572 was reported as accurate.

Anonymous · November 9, 2017

Serial Number 383572 was reported as accurate.

Anonymous · November 3, 2017

Serial Number 383572 was reported as accurate.

Anonymous · July 7, 2017

Serial Number 383529 was reported as accurate.

la81la81 2 · June 2, 2017

Serial Number 383453 was reported as accurate.

Anonymous · April 26, 2017

Serial Number 383451 was reported as accurate.

Anonymous · March 1, 2017

Serial Number 383529 was reported as accurate.

Gimparoo Supporter 703 · September 25, 2016

Serial Number 383516 was reported as accurate.

Gimparoo Supporter 703 · September 24, 2016

Serial Number 383616 was reported as accurate.

rock862 242 · June 24, 2016

Serial Number 383518 was reported as accurate.

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

Anonymous · January 11, 2015

Serial Number 383342 was reported as accurate.

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

Anonymous · June 18, 2014

Serial Number 383664 was reported as accurate.

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

Anonymous · February 4, 2014

Serial Number 383677 was reported as accurate.

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

Anonymous · September 2, 2013

Serial Number 383335 was reported as accurate.

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

Anonymous · April 27, 2013

Serial Number 383603 was reported as accurate.

Hamilton Grade 990 Pocket Watch