Pocket Watch Database

We noticed that you entered a relatively short serial number.
"20" could possibly indicate the grade of the watch and not the serial number of your movement. Serial numbers are usually more than a few digits.

Due to the lack of existing factory records, our U.S. Watch Co. (Waltham, Mass) 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:
U.S. Watch Co. (Waltham, Mass) Grade Dome Pocket Watch

U.S. Watch Co. (Waltham, Mass)

Grade: Dome

Manufacturer: U.S. Watch Co. (Waltham, Mass) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 20 Question Mark
Grade: Dome Question Mark
Model: 1885 Question Mark
Estimated Production Year: 1887 Question Mark
Run Quantity: 50 Question Mark
Grade/Model Run: 1 of 3 Question Mark
Grade/Model Total Production: 5,750 Question Mark
Size: 16s Question Mark
Jewels: 7j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Gilt Question Mark
Movement Setting: Pendant Question Mark
Plate: Full Plate Question Mark
Balance Type: Expansion Question Mark
Regulator: Plain Question Mark
Hairspring: Flat Question Mark
Adjusted: No Question Mark
Railroad Grade: No Question Mark
Movement Markings: U.S. Watch Co.
Waltham, Mass.
Chas. W. Woerd's
Patents
Case: Various Question Mark
Run ID: 1.G1.16S1.161885M1.O1.P1.7J1 Question Mark
Database Version: v52.427 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
17.31 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
116.19 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.687% Question Mark
Registry Population:
Scoped for This Run Only
1 (2.00%) Question Mark

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U.S. Watch Co. (Waltham, Mass) Grade Dome Pocket Watch