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 2 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 2

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 857321
Grade: Series 2
Model: 1905
Estimated Production Year: 1902
Run Quantity: 800
Total Production: 4,570
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Raised Gold Settings (Screw-Set)
Movement Configuration: Hunting
Movement Finish: Nickel
Finish Pattern: Parallel Bar (narrow)
Movement Setting: Pendant
Plate: 3/4 Plate
Double Roller: Yes
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Research Note: #857234 and #857813: Reported as Lever-Set. #857321: Verified as Lever-Set. #857902: Verified as Pendant-Set

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

857201
Verification Serial Map
858000

esoxhunter 112 · July 15, 2020

Serial Number 857321 was reported as inaccurate.

Note: Hi Nathan - Just a heads up: this watch appears
to be a 3/4 Plate, as are the others downloaded to
this page. Am I missing something?
Curator Response: Thanks for catching that. This run has been updated accordingly.
Changes since this report was submitted:
Plate changed from Bridge to 3/4

Kurlander 17 · December 5, 2019

Serial Number 857849 was reported as accurate.

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

rjbeck 147 · September 22, 2019

Serial Number 857985 was reported as accurate.

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

Anonymous · September 9, 2019

Serial Number 857985 was reported as accurate.

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

Anonymous · May 17, 2019

Serial Number 857788 was reported as accurate.

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

WLBelkriver33 804 · February 22, 2019

Serial Number 857614 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4
E. Howard Watch Co. (Keystone) Grade Series 2 Pocket Watch Movement