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 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 907052
Grade: Series 3
Model: 1905
Estimated Production Year: 1908
Run Quantity: 7,100
Grade/Model Run: 14 of 44
Grade/Model Total Production: 61,640
Variant Est. Production: 28,700 (16S-M1905-17J-ONP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
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: 37.G14.16S20.161905M20.O23.P31.17J23
Database Version: v52.204
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
85.93
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
287.19
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
5.554%
Registry Population: 22 (0.31%)
$ Estimated Value (12 Month Change): 2.26% Analyzing 181 Sales

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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 · January 23, 2023

Serial Number 900747 was reported as accurate.

Anonymous · December 6, 2021

Serial Number 900798 was reported as accurate.

Anonymous · April 26, 2021

Serial Number 900948 was reported as accurate.

Anonymous · May 27, 2020

Serial Number 900119 was reported as accurate.

Anonymous · April 27, 2020

Serial Number 900119 was reported as accurate.

Anonymous · October 21, 2018

Serial Number 900554 was reported as accurate.

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