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 10 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 10

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1170293
Grade: Series 10
Variation: Ser. 10
Model: 1907
Estimated Production Year: 1912
Run Quantity: 2,000
Total Production: 18,000
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Parallel
Movement Inlay Color: Black
Movement Setting: Mixed
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Barrel: Going
Regulator: Reed
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Dial Feet Locations: 10.7, 24.3, 48.9
Database Version: v48.038

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

1170001
Verification Serial Map
1172000

Anonymous · February 27, 2022

Serial Number 1171749 was reported as accurate.

okiejohn 310 · November 29, 2021

Serial Number 1171773 was reported as accurate.

aconner 56 · July 24, 2021

Serial Number 1170346 was reported as accurate.

23Greenwich Supporter 105 · July 8, 2021

Serial Number 1170497 was reported as accurate.

Anonymous · December 1, 2020

Serial Number 1171987 was reported as accurate.

Anonymous · August 9, 2020

Serial Number 1170012 was reported as inaccurate.

Note: E Howard was in Boston, Mass., not Waltham.
Curator Response: Thanks for the report. However, it is incorrect. While the movements are marked "Boston," the company was operated out of the old factory used by the U.S. Watch Company in Waltham, Massachusetts.

rmwatchandclock 223 · July 28, 2020

Serial Number 1170309 was reported as inaccurate.

Note: Serial number 1170309 is pendant set, not lever
set.
Changes since this report was submitted:
Movement Setting changed from Lever to Mixed
Railroad Grade changed from Yes to No

Anonymous · January 15, 2020

Serial Number 1171341 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Lever to Mixed
Railroad Grade changed from Yes to No

Anonymous · February 18, 2019

Serial Number 1170049 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Lever to Mixed
Railroad Grade changed from Yes to No

Anonymous · December 9, 2018

Serial Number 1170324 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Lever to Mixed
Railroad Grade changed from Yes to No

Anonymous · November 14, 2018

Serial Number 1170098 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Lever to Mixed
Railroad Grade changed from Yes to No
E. Howard Watch Co. (Keystone) Grade Series 10 Pocket Watch