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: 15357
Grade: Series 12
Model: 1921
Estimated Production Year: 1921
Run Quantity: 26,000
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

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Data Verification Reports

12001
Verification Serial Map
38000

Anonymous · August 23, 2020

Serial Number 12247 was reported as accurate.

Anonymous · August 1, 2020

Serial Number 29882 was reported as accurate.

Anonymous · July 19, 2020

Serial Number 29882 was reported as accurate.

Anonymous · July 15, 2020

Serial Number 15476 was reported as accurate.

Anonymous · July 1, 2020

Serial Number 21518 was reported as accurate.

Anonymous · June 15, 2020

Serial Number 28340 was reported as accurate.

Anonymous · June 9, 2020

Serial Number 22935 was reported as accurate.

Anonymous · May 31, 2020

Serial Number 18852 was reported as accurate.

cmdraven 2801 · May 28, 2020

Serial Number 20891 was reported as accurate.

Anonymous · April 5, 2020

Serial Number 25981 was reported as accurate.

okiejohn 231 · March 13, 2020

Serial Number 15357 was reported as accurate.

Anonymous · March 9, 2020

Serial Number 14308 was reported as accurate.

Anonymous · March 4, 2020

Serial Number 22219 was reported as accurate.

Anonymous · February 26, 2020

Serial Number 14988 was reported as accurate.

Andrew9000 74 · February 21, 2020

Serial Number 33276 was reported as accurate.

Anonymous · February 17, 2020

Serial Number 21518 was reported as accurate.

Anonymous · January 18, 2020

Serial Number 23671 was reported as accurate.

mickroid 45 · January 1, 2020

Serial Number 25462 was reported as accurate.

Anonymous · January 1, 2020

Serial Number 18903 was reported as accurate.

Andrew9000 74 · May 7, 2019

Serial Number 20987 was reported as accurate.

Andrew9000 74 · May 7, 2019

Serial Number 20987 was reported as accurate.

Anonymous · April 24, 2019

Serial Number 19017 was reported as accurate.

Anonymous · April 16, 2019

Serial Number 17522 was reported as accurate.

Anonymous · March 11, 2019

Serial Number 27839 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · March 10, 2019

Serial Number 37175 was reported as accurate.

Anonymous · February 25, 2019

Serial Number 17156 was reported as accurate.

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