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: 385855
Grade: 990
Model: 1
Estimated Production Year: 1907
Run Quantity: 200
Grade/Model 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: v49.708

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
Image Credit: fourleaf57
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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Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.


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