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

E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 912966
Grade: Series 3
Model: 1905
Estimated Production Year: 1908
Run Quantity: 2,000
Grade/Model Run: 17 of 44
Grade/Model Total Production: 61,640
Variant Est. Production: 32,940 (16S-M1905-17J-HNP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Hunting
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
Railroad Grade: No
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 40.G17.16S23.161905M23.H10.P34.17J26
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
98.62
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
329.63
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
6.375%
Registry Population: 39 (1.95%)
$ Estimated Value (12 Month Change): 2.26% Analyzing 181 Sales
Research Note: #911629 and #912292: Reported as Openface

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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 · February 5, 2023

Serial Number 912990 was reported as accurate.

Anonymous · January 13, 2021

Serial Number 912926 was reported as accurate.

Anonymous · March 6, 2020

Serial Number 912471 was reported as accurate.

backintime 16 · December 22, 2019

Serial Number 912125 was reported as accurate.

Anonymous · August 5, 2019

Serial Number 912389 was reported as accurate.

Anonymous · September 28, 2018

Serial Number 911271 was reported as accurate.

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