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From the American Horology Archive:
Rockford Watch Co.

Grade: 66

Pressed Upper Balance Jewel

Manufacturer: Rockford ?
Manufacturer Location: Rockford, Illinois ?
Movement Serial Number: 417460 ?
Grade: 66 ?
Model: 7 ?
Estimated Production Year: 1893 ?
Run Quantity: 500 ?
Grade/Model Run: 6 of 17 ?
Grade/Model Total Production: 14,700 ?
Variant Est. Production: 14,000 (18S-M7-11J) ?
Size: 18s ?
Jewels: 11j ?
Jewel Setting: Screw-Set ?
Movement Configuration: Openface ?
Movement Finish: Nickel ?
Movement Inlay Color: Black ?
Movement Setting: Lever ?
Plate: Full Plate ?
Regulator: Plain ?
Hairspring: Flat ?
Standard Dial Type: Single-Sunk ?
Adjusted: No ?
Railroad Grade: No ?
Movement Markings: R.W.Co. Rockford Ill. ?
Case: Various ?
Run ID: 456.66G13.18S392.187M80.O92.L319.11J102 ?
Data Research: 1907 Rockford Serial List ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 5 (1.00%) ?
$ Estimated Value (12 Month Change): 0.00% Analyzing 113 Sales ?