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 7 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 999587 Question Mark
Grade: Series 7 Question Mark
Variation: Stopworks Question Mark
Model: 1908 Question Mark
Estimated Production Year: 1908 Question Mark
Run Quantity: 300 Question Mark
Grade/Model Run: 5 of 20 Question Mark
Grade/Model Total Production: 52,950 Question Mark
Variant Est. Production: 9,750 (12S-M1908-17J-ONP-A3PT-STOPWORKS) Question Mark
Size: 12s Question Mark
Jewels: 17j Question Mark
Jewel Setting: Burnished Jewels Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Paralell Question Mark
Movement Setting: Pendant Question Mark
Plate: Bridge Plate Question Mark
Double Roller: Yes Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Standard Dial Type: Single-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 3 Question Mark
Adjusted to Temperature: Yes Question Mark
Railroad Grade: No Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Adjusted
17 Jewels
Pat'd '08
Case: Various Question Mark
Run ID: 135.G5.12S5.121908M5.O77.P112.17J101 Question Mark
Database Version: v52.428 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
130.82 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
460.17 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
8.316% Question Mark
Registry Population:
Scoped for This Run Only
2 (0.67%) Question Mark
Research Note: Equipped with Stop-Works

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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 · November 6, 2018

Serial Number 999668 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch