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 4 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 4

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 968423
Grade: Series 4
Model: 1905
Estimated Production Year: 1910
Run Quantity: 1,000
Grade/Model Run: 16 of 22
Grade/Model Total Production: 16,610
Variant Est. Production: 3,530 (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: Checkerboard
Movement Setting: Pendant
Plate: 3/4 Plate
Double Roller: Yes
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
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: 92.G16.16S74.161905M70.H34.P78.17J73
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
10.57
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
35.24
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.683%
Registry Population: 19 (1.90%)
$ Estimated Value (12 Month Change): -14.01% Analyzing 69 Sales
Research Note: #968661: Verified with Narrow Parallel Pattern

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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 · June 16, 2021

Serial Number 968077 was reported as accurate.

Anonymous · November 11, 2020

Serial Number 968492 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 4 Pocket Watch