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From the American Horology Archive:
U.S. Watch Co. (Waltham, Mass)

Grade: Betsy Ross

Manufacturer: U.S. Watch Co. (Waltham, Mass) ?
Manufacturer Location: Jersey City, New Jersey (New York) ?
Movement Serial Number: 852108 ?
Grade: Betsy Ross ?
Model: Suffolk ?
Estimated Production Year: 1907 ?
Run Quantity: 61,000 ?
Grade/Model Run: 3 of 3 ?
Grade/Model Total Production: 75,200 ?
Size: 0s ?
Jewels: 7j ?
Movement Configuration: Hunting ?
Movement Finish: Nickel ?
Movement Setting: Pendant ?
Regulator: Plain ?
Hairspring: Breguet ?
Adjusted: No ?
Railroad Grade: No ?
Movement Markings: Betsy Ross U.S.A. ?
Case: Various ?
Run ID: 373.G3.0S56.M56.H280.P60.7J91 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 32 (0.05%) ?