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 7 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1366776
Grade: Series 7
Variation: Arrow and Empty Circle
Model: 1912
Estimated Production Year: 1919
Run Quantity: 11,000
Total Production: 172,700
Size: 12s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Railroad Grade: No

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Data Verification Reports

1363001
Verification Serial Map
1374000

Anonymous · October 7, 2020

Serial Number 1370843 was reported as accurate.

Anonymous · August 1, 2020

Serial Number 1365887 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 1365887 was reported as accurate.

Anonymous · December 29, 2019

Serial Number 1373032 was reported as accurate.

Anonymous · November 24, 2019

Serial Number 1373569 was reported as accurate.

Anonymous · September 4, 2019

Serial Number 1370000 was reported as accurate.

Anonymous · July 29, 2019

Serial Number 1367502 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · July 27, 2019

Serial Number 1373130 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · June 26, 2019

Serial Number 1365010 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · May 17, 2019

Serial Number 1372880 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

darkstar 245 · May 13, 2019

Serial Number 1371384 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · May 4, 2019

Serial Number 1372036 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · March 13, 2019

Serial Number 1370389 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

pmtime 208 · March 6, 2019

Serial Number 1363866 was reported as inaccurate.

Note: This serial # is a 12S 17J series 7 with bridge
mvt, adj. to 3p
Curator Response: Thanks for the report and images. The database has been updated accordingly.
Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · December 31, 2018

Serial Number 1364793 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · December 15, 2018

Serial Number 1365273 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · November 28, 2018

Serial Number 1372411 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · November 7, 2018

Serial Number 1367889 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · October 24, 2018

Serial Number 1366000 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · October 13, 2018

Serial Number 1371681 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch Movement