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

Grade: 45

Introduced 1888

Manufacturer: U.S. Watch Co. (Waltham, Mass) ?
Manufacturer Location: Waltham, Massachusetts ?
Movement Serial Number: 91115 ?
Grade: 45 ?
Model: 1888H ?
Estimated Production Year: 1892 ?
Run Quantity: 500 ?
Grade/Model Run: 7 of 9 ?
Grade/Model Total Production: 3,000 ?
Variant Est. Production: 2,900 (18S-M1888H-G) ?
Size: 18s ?
Jewels: 15j ?
Jewel Setting: Gold Settings (Screw-Set) ?
Movement Configuration: Hunting ?
Movement Finish: Gilt ?
Movement Setting: Lever ?
Plate: Full Plate ?
Regulator: Micrometric ?
Hairspring: Breguet ?
Standard Dial Type: Single-Sunk ?
Adjusted: No ?
Railroad Grade: No ?
Movement Markings: U.S. Watch Co. Waltham, Mass. ?
Case: Various ?
Run ID: 143.45G7.18S54.M46.H99.L99.15J39 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 4 (0.80%) ?