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 15 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 15

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 11607
Grade: Series 15
Model: 1921
Estimated Production Year: 1921
Run Quantity: 4,000
Total Production: 5,000
Size: 10s
Jewels: 19j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
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: No

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Data Verification Reports

8001
Verification Serial Map
12000

Anonymous · October 8, 2020

Serial Number 11775 was reported as accurate.

Anonymous · August 13, 2020

Serial Number 10346 was reported as inaccurate.

No further details were submitted with the report.

ralph1 43 · July 15, 2020

Serial Number 9220 was reported as inaccurate.

Note: E. Howard watch co
serial# 9220
Boston. U.S.A
Pat'D 21
black triangle with a circle around it and an
arrow through circle
I will upload picture, hope this helps

Anonymous · June 18, 2020

Serial Number 9082 was reported as accurate.

Anonymous · June 18, 2020

Serial Number 9082 was reported as accurate.

Anonymous · June 13, 2020

Serial Number 11415 was reported as accurate.

Anonymous · June 13, 2020

Serial Number 11415 was reported as accurate.

Anonymous · June 11, 2020

Serial Number 11926 was reported as accurate.

Anonymous · April 30, 2020

Serial Number 10420 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · January 22, 2020

Serial Number 10253 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · December 30, 2019

Serial Number 8336 was reported as accurate.

Anonymous · December 24, 2019

Serial Number 8887 was reported as accurate.

Anonymous · May 20, 2019

Serial Number 9218 was reported as accurate.

Anonymous · February 27, 2019

Serial Number 8786 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 15 Pocket Watch