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: 308522
Grade: 990
Model: 1
Estimated Production Year: 1904
Run Quantity: 700
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: 17 (2.43%)
Database Version: v49.701

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 308042 #42 Inferred
2 308063 #63 Marketplace November 14, 2013
3 308071 #71 Marketplace February 04, 2022
4 308085 #85 Marketplace November 06, 2017
5 308278 #278 Inferred
6 308279 #279 Marketplace May 01, 2017
7 308304 #304 Inferred
8 308371 #371 Marketplace November 12, 2021
9 308417 #417 Inferred
10 308503 #503 Marketplace October 08, 2018
11
Image Credit: oldschool59
308522 #522 Collection January 19, 2018
12 308547 #547 Collection March 15, 2013
13 308600 #600 Collection March 25, 2015
14 308616 #616 Collection April 15, 2018
15
Image Credit: davehere
308654 #654 Collection February 22, 2018
16 308658 #658 Marketplace April 11, 2020
17 308688 #688 Marketplace January 24, 2021
Standard Deviation of Known Examples: 228.62 (Expected: 202.22, Δ26.40/3.77%)

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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.


10mueller 38 · July 10, 2021

Serial Number 308688 was reported as accurate.

Anonymous · August 2, 2019

Serial Number 308528 was reported as accurate.

Anonymous · April 11, 2019

Serial Number 308463 was reported as accurate.

dfchong 837 · March 26, 2019

Serial Number 308522 was reported as accurate.

733harry 31 · November 6, 2017

Serial Number 308085 was reported as accurate.

Anonymous · August 20, 2017

Serial Number 308278 was reported as inaccurate.

Note: According to the Hamilton ledgers this was
finished on 5/20/1904
https://nawcc.org/images/stories/Hamilton/LedgerP
ages/300001-400000/308201-308251.pdf
Curator Response: Thanks for the report. "To Finishing Department" (Dec 10, 1903) and "Date Finished" will be different. The dated ledgers for individual serial numbers have not been transcribed yet.

Anonymous · July 18, 2017

Serial Number 308278 was reported as accurate.

Gimparoo Supporter 703 · June 20, 2017

Serial Number 308279 was reported as accurate.

Anonymous · May 9, 2017

Serial Number 308478 was reported as accurate.

fordcasa Top Contributor Supporter 418 · August 11, 2015

Serial Number 308359 was reported as accurate.

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

Bluejay 179 · July 19, 2015

Serial Number 308663 was reported as accurate.

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

thomase 42 · March 25, 2015

Serial Number 308600 was reported as accurate.

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

Anonymous · October 26, 2014

Serial Number 308600 was reported as accurate.

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

Anonymous · October 22, 2014

Serial Number 308600 was reported as accurate.

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

Anonymous · October 22, 2014

Serial Number 308600 was reported as accurate.

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

Anonymous · July 4, 2014

Serial Number 308547 was reported as accurate.

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

Anonymous · January 8, 2014

Serial Number 308362 was reported as accurate.

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

Anonymous · September 2, 2013

Serial Number 308234 was reported as accurate.

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

Anonymous · August 31, 2013

Serial Number 308227 was reported as accurate.

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

milgauss 24 · June 15, 2013

Serial Number 308370 was reported as accurate.

Anonymous · March 24, 2013

Serial Number 308547 was reported as accurate.

Anonymous · March 15, 2013

Serial Number 308547 was reported as accurate.

Anonymous · March 11, 2013

Serial Number 308547 was reported as accurate.

Anonymous · August 10, 2012

Serial Number 308298 was reported as accurate.

Hamilton Grade 990 Pocket Watch