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: 388298
Grade: 990
Model: 1
Estimated Production Year: 1907
Run Quantity: 400
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 (3.25%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 388094 #94 Marketplace August 29, 2013
2 388124 #124 Marketplace September 05, 2018
3 388153 #153 Marketplace February 24, 2013
4 388203 #203 Marketplace April 13, 2014
5 388236 #236 Marketplace January 11, 2013
6 388253 #253 Marketplace April 11, 2019
7 388256 #256 Marketplace January 25, 2015
8 388268 #268 Collection August 18, 2016
9 388298 #298 Collection November 22, 2017
10 388300 #300 Marketplace September 28, 2019
11 388316 #316 Inferred
12 388323 #323 Inferred
13 388353 #353 Marketplace July 18, 2020
Standard Deviation of Known Examples: 80.15 (Expected: 115.61, Δ35.47/8.87%)

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Data Verification Reports

388001
Verification Serial Map
388400

Anonymous · September 29, 2019

Serial Number 388300 was reported as accurate.

Anonymous · May 3, 2019

Serial Number 388064 was reported as accurate.

backwardglance1 99 · September 14, 2018

Serial Number 388089 was reported as accurate.

Rickhufnagel7 Top Contributor Elgin Expert Hampden Expert Supporter 614 · March 20, 2018

Serial Number 388270 was reported as accurate.

fixmenow 31 · November 22, 2017

Serial Number 388298 was reported as accurate.

Anonymous · June 6, 2015

Serial Number 388122 was reported as accurate.

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

Gasperoff 727 · March 15, 2015

Serial Number 388256 was reported as accurate.

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

Gasperoff 727 · March 15, 2015

Serial Number 388256 was reported as accurate.

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

Gasperoff 727 · March 11, 2015

Serial Number 388256 was reported as accurate.

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

Gasperoff 727 · February 16, 2015

Serial Number 388256 was reported as accurate.

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

Anonymous · March 6, 2014

Serial Number 388042 was reported as accurate.

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

Anonymous · August 1, 2013

Serial Number 388027 was reported as accurate.

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

Anonymous · March 3, 2013

Serial Number 388153 was reported as accurate.

Anonymous · February 27, 2013

Serial Number 388153 was reported as accurate.

Anonymous · February 24, 2013

Serial Number 388316 was reported as accurate.

Anonymous · February 17, 2013

Serial Number 388316 was reported as accurate.

Anonymous · September 9, 2012

Serial Number 388316 was reported as accurate.

Anonymous · June 18, 2012

Serial Number 388253 was reported as accurate.

Anonymous · June 11, 2012

Serial Number 388253 was reported as accurate.

Hamilton Grade 990 Pocket Watch