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From the American Horology Archive:
United States Watch Co. (Marion)

Grade: George Channing

Mixed Run: Key-Set and Button-Set Movements, Gold Balance Screws

Manufacturer: U.S. Watch Co. (Marion, NJ) ?
Manufacturer Location: Marion, New Jersey ?
Movement Serial Number: 3806 ?
Grade: George Channing ?
Variation: No. 37 1/4 ?
Model: 1 ?
Estimated Production Year: 1867 ?
Run Quantity: 1,000 ?
Grade/Model Run: 1 of 9 ?
Grade/Model Total Production: 5,060 ?
Variant Est. Production: 1,300 (18S-M1-H-M-G) ?
Size: 18s ?
Jewels: 15j ?
Movement Configuration: Hunting ?
Movement Finish: Gilt ?
Movement Setting: Mixed ?
Plate: Full Plate ?
Balance Type: Expansion ?
Regulator: Plain Out ?
Movement Markings: George Channing Marion, N.J. Giles Patent Mch 13th '66 ?
Case: Various ?
Run ID: 15.G1.18S4.181M4.H7.M3.15J1 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 4 (0.40%) ?
Research Note: Mixed Setting Types In Run: KS/BS