Pocket Watch Database

Due to the lack of existing factory records, our E. Howard Watch Co. (Keystone) database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.

From the American Horology Archive:
E. Howard Watch Co. (Keystone) Grade Series 12 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 12

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 51558
Grade: Series 12
Model: 1921
Estimated Production Year: 1923
Run Quantity: 3,000
Total Production: 47,450
Size: 10s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Database Version: v46.977

Help Us Help Others By Improving the Database:

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Data Verification Reports

49001
Verification Serial Map
52000

Anonymous · May 22, 2021

Serial Number 51213 was reported as accurate.

mikegoldnj 1 · April 21, 2021

Serial Number 49315 was reported as accurate.

MoatsJustin1 1750 · December 31, 2020

Serial Number 51175 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 50262 was reported as accurate.

KBean001 34 · July 4, 2020

Serial Number 50640 was reported as accurate.

Anonymous · December 26, 2019

Serial Number 51558 was reported as accurate.

Anonymous · April 30, 2019

Serial Number 50494 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 12 Pocket Watch Movement