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 0 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 0

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1136325
Grade: Series 0
Variation: Hooked Bridge Jeweled Banking Pins
Model: 1907
Estimated Production Year: 1912
Run Quantity: 500
Grade/Model Run: 20 of 29
Grade/Model Total Production: 16,500
Variant Est. Production: 700 (16S-M1907-23J-HNL-A5PTI-HOOKED BRIDGE JEWELED BANKING PINS)
Size: 16s
Jewels: 23j
Jewel Material: Ruby & Sapphire
Movement Configuration: Hunting
Movement Finish: Nickel
Movement Setting: Lever or Pendant
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Regulator: Reed
Hairspring: Breguet
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: 796162, 886387, 900183, 978612, 981667, 1062645
Case: Various
Run ID: 228.G21.16S147.161907M56.H60.L16.23J27
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
10.03
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
33.43
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.648%
Registry Population: 2 (0.40%)
$ Estimated Value (12 Month Change): -17.23% Analyzing 88 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 · June 10, 2023

Serial Number 1136302 was reported as accurate.

Anonymous · May 20, 2021

Serial Number 1136386 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 0 Pocket Watch