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: 835675
Grade: 990
Model: 1
Estimated Production Year: 1911
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: 5 (2.50%)
Database Version: v49.708

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 835619 #19 Marketplace October 30, 2015
2 835657 #57 Marketplace December 15, 2014
3
Image Credit: Yellowtail420
835675 #75 Collection November 15, 2015
4 835679 #79 Marketplace September 22, 2020
5 835735 #135 Marketplace August 29, 2022
Standard Deviation of Known Examples: 42.00 (Expected: 57.88, Δ15.88/7.94%)

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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 · December 14, 2019

Serial Number 835735 was reported as accurate.

Anonymous · November 15, 2015

Serial Number 835675 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No
Hamilton Grade 990 Pocket Watch