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 9 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 9

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1145536 Question Mark
Grade: Series 9 Question Mark
Model: 1905 Question Mark
Estimated Production Year: 1910 Question Mark
Run Quantity: 500 Question Mark
Grade/Model Run: 13 of 14 Question Mark
Grade/Model Total Production: 15,610 Question Mark
Variant Est. Production: 1,000 (16S-M1905-17J-ONL) Question Mark
Size: 16s Question Mark
Jewels: 17j Question Mark
Jewel Setting: Gold Settings (Screw-Set) Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Checkerboard Question Mark
Movement Setting: Lever Question Mark
Plate: 3/4 Plate Question Mark
Double Roller: Yes Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 3 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Dial Feet Locations: 10.7, 24.3, 48.9 Question Mark
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Adjusted
17 Jewels
Pat'd '05
Case: Various Question Mark
Run ID: 241.G13.16S162.161905M97.O159.L42.17J124 Question Mark
Database Version: v52.516 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
34.62 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
121.72 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.199% Question Mark
Registry Population:
Scoped for This Run Only
11 (2.20%) Question Mark

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.


cjbrem Supporter 955 · December 14, 2024

Serial Number 1145988 was reported as accurate.

Anonymous · March 23, 2022

Serial Number 1145779 was reported as inaccurate.

Note: Everything seems accurate except, my E. Howard
serial number 1145779 is a pendent set. Also, the
gears seem to be nickel plated.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.

Anonymous · March 23, 2022

Serial Number 1145779 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · October 27, 2020

Serial Number 1145988 was reported as accurate.

Anonymous · October 15, 2019

Serial Number 1145800 was reported as inaccurate.

Note: Lever Set RR Grade.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Movement Setting changed from Pendant to Lever

Anonymous · September 4, 2019

Serial Number 1145894 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Pendant to Lever

ScottA 30 · June 20, 2019

Serial Number 1145900 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Pendant to Lever
E. Howard Watch Co. (Keystone) Grade Series 9 Pocket Watch