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 11 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 11

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1312217
Grade: Series 11
Variation: Arrow and Star
Model: E
Estimated Production Year: 1916
Run Quantity: 3,000
Total Production: 25,100
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Railroad Grade Classification: Class A
Database Version: v48.139

Help Us Help Others By Improving the Database:

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Data Verification Reports

1311001
Verification Serial Map
1314000

Anonymous · March 29, 2022

Serial Number 1311192 was reported as accurate.

Anonymous · November 2, 2020

Serial Number 1311548 was reported as accurate.

Kurlander Supporter 20 · August 24, 2020

Serial Number 1311432 was reported as accurate.

rjmurton1964 34 · April 4, 2020

Serial Number 1312217 was reported as accurate.

Anonymous · January 7, 2020

Serial Number 1313697 was reported as accurate.

Pair1949 1 · September 14, 2019

Serial Number 1312667 was reported as accurate.

Anonymous · June 21, 2019

Serial Number 1311997 was reported as accurate.

Anonymous · January 27, 2019

Serial Number 1312534 was reported as accurate.

Anonymous · December 20, 2018

Serial Number 1313697 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 11 Pocket Watch Movement