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: 1360140
Grade: Series 11
Variation: Arrow and Star
Model: E
Estimated Production Year: 1919
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: v46.977

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Data Verification Reports

1360001
Verification Serial Map
1363000

Mobilaero Top Contributor Supporter 253 · September 23, 2021

Serial Number 1362755 was reported as accurate.

Anonymous · August 9, 2021

Serial Number 1362730 was reported as inaccurate.

Note: series 11
16 s
21 jewels
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Grade changed from ? to Series 11
Railroad Grade changed from No to Yes

Anonymous · June 6, 2021

Serial Number 1361602 was reported as accurate.

Anonymous · May 16, 2021

Serial Number 1360454 was reported as accurate.

Kmorgan 9 · December 19, 2020

Serial Number 1361626 was reported as accurate.

Anonymous · November 23, 2020

Serial Number 1361639 was reported as accurate.

Anonymous · August 15, 2020

Serial Number 1360679 was reported as accurate.

Roberthunigan Supporter 24 · August 15, 2020

Serial Number 1360835 was reported as accurate.

KANDYMAN2014 14 · August 7, 2020

Serial Number 1360646 was reported as accurate.

Anonymous · May 11, 2020

Serial Number 1360615 was reported as accurate.

Anonymous · April 22, 2020

Serial Number 1360611 was reported as accurate.

Anonymous · April 21, 2020

Serial Number 1362297 was reported as accurate.

Roberthunigan Supporter 24 · April 15, 2020

Serial Number 1360835 was reported as accurate.

Kaylyngrace1 4 · March 31, 2020

Serial Number 1360835 was reported as accurate.

Kaylyngrace1 4 · March 27, 2020

Serial Number 1360835 was reported as accurate.

Anonymous · January 22, 2020

Serial Number 1360610 was reported as accurate.

Anonymous · August 9, 2019

Serial Number 1362695 was reported as accurate.

Anonymous · August 9, 2019

Serial Number 1362695 was reported as accurate.

Anonymous · March 19, 2019

Serial Number 1360694 was reported as accurate.

WLBelkriver33 804 · March 19, 2019

Serial Number 1360694 was reported as accurate.

Anonymous · December 29, 2018

Serial Number 1360127 was reported as accurate.

Anonymous · December 25, 2018

Serial Number 1361367 was reported as accurate.

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