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)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1145536
Grade: Series 9
Model: 1905
Estimated Production Year: 1912
Run Quantity: 500
Grade/Model Run: 14 of 15
Grade/Model Total Production: 16,610
Variant Est. Production: 500 (16S-M1905-17J-ONL)
Size: 16s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Checkerboard
Movement Setting: Lever
Plate: 3/4 Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: 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
Case: Various
Run ID: 235.G14.16S153.161905M92.O143.L33.17J120
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
34.43
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
115.02
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.226%
Registry Population: 11 (2.20%)

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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.


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