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 10 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 10

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1144502 Question Mark
Grade: Series 10 Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1909 Question Mark
Run Quantity: 500 Question Mark
Grade/Model Run: 2 of 21 Question Mark
Grade/Model Total Production: 17,800 Question Mark
Variant Est. Production: 15,650 (16S-M1907-21J-ONL) Question Mark
Size: 16s Question Mark
Jewels: 21j Question Mark
Jewel Setting: Burnished Jewels Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Parallel Question Mark
Movement Inlay Color: Black Question Mark
Movement Setting: Lever Question Mark
Plate: Bridge Plate Question Mark
Bridge Type: Center Question Mark
Double Roller: Yes Question Mark
Barrel: Going Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Railroad Grade: Yes Question Mark
Dial Feet Locations: 10.7, 24.3, 48.9 Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
21 Jewels
Series 10
[Star in Arrow]
Pat'd.
Extra Adjustment
Five Positions
Temperature
Case: Various Question Mark
Run ID: 239.G2.16S160.161907M58.O157.L41.21J25 Question Mark
Database Version: v52.528 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
53.59 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
188.45 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.404% Question Mark
Registry Population:
Scoped for This Run Only
2 (0.40%) Question Mark
$ Estimated Value (12 Month Change): 10.79% Analyzing 176 Sales Question Mark

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E. Howard Watch Co. (Keystone) Grade Series 10 Pocket Watch