Pocket Watch Database

There is an alternative result available for this serial number. View the result for E. Howard & Co. movement #11607.

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 15 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 15

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 11607
Grade: Series 15
Model: 1921
Estimated Production Year: 1921
Run Quantity: 4,000
Grade/Model Run: 1 of 2
Grade/Model Total Production: 5,000
Size: 10s
Jewels: 19j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Case: Various
Run ID: 2.G1.10S2.101921M2.O2.P2.19J1
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
14.97
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
49.95
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.968%
Registry Population: 4 (0.10%)

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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.


joelgetz Supporter 5 · November 9, 2023

Serial Number 11605 was reported as accurate.

Anonymous · March 28, 2023

Serial Number 11834 was reported as accurate.

Anonymous · October 2, 2022

Serial Number 10817 was reported as accurate.

Anonymous · February 28, 2022

Serial Number 11561 was reported as accurate.

Anonymous · September 9, 2021

Serial Number 8777 was reported as accurate.

Anonymous · May 10, 2021

Serial Number 9298 was reported as accurate.

Anonymous · October 8, 2020

Serial Number 11775 was reported as accurate.

Anonymous · August 13, 2020

Serial Number 10346 was reported as inaccurate.

No further details were submitted with the report.

ralph1 105 · July 15, 2020

Serial Number 9220 was reported as inaccurate.

Note: E. Howard watch co
serial# 9220
Boston. U.S.A
Pat'D 21
black triangle with a circle around it and an
arrow through circle
I will upload picture, hope this helps

Anonymous · June 18, 2020

Serial Number 9082 was reported as accurate.

Anonymous · June 18, 2020

Serial Number 9082 was reported as accurate.

Anonymous · June 13, 2020

Serial Number 11415 was reported as accurate.

Anonymous · June 13, 2020

Serial Number 11415 was reported as accurate.

Anonymous · June 11, 2020

Serial Number 11926 was reported as accurate.

Anonymous · April 30, 2020

Serial Number 10420 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · January 22, 2020

Serial Number 10253 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · December 30, 2019

Serial Number 8336 was reported as accurate.

Anonymous · December 24, 2019

Serial Number 8887 was reported as accurate.

Anonymous · May 20, 2019

Serial Number 9218 was reported as accurate.

Anonymous · February 27, 2019

Serial Number 8786 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 15 Pocket Watch