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: 854726
Grade: Series 3
Model: 1905
Estimated Production Year: 1905
Run Quantity: 1,000
Grade/Model Run: 1 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
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 12.G1.16S1.161905M1.O12.P12.17J6
Database Version: v52.221
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: 19 (1.90%)
$ 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 · March 27, 2023

Serial Number 854804 was reported as accurate.

Anonymous · September 11, 2022

Serial Number 854726 was reported as accurate.

Anonymous · March 6, 2021

Serial Number 854603 was reported as accurate.

brg404 32 · March 2, 2021

Serial Number 854332 was reported as accurate.

Anonymous · August 12, 2020

Serial Number 854168 was reported as accurate.

gloverdg 10 · March 26, 2020

Serial Number 854746 was reported as accurate.

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