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 3 Pocket Watch Movement
E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 854164
Grade: Series 3
Model: 1905
Estimated Production Year: 1902
Run Quantity: 1,000
Total Production: 61,500
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Circular
Movement Setting: Pendant
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Single-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667

Help Us Help Others By Improving the Database:

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Data Verification Reports

854001
Verification Serial Map
855000

Anonymous · March 6, 2021

Serial Number 854603 was reported as accurate.

brg404 17 · March 2, 2021

Serial Number 854332 was reported as accurate.

Anonymous · August 12, 2020

Serial Number 854168 was reported as accurate.

gloverdg 10 · March 26, 2020

Serial Number 854746 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch Movement
E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch Movement