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From the American Horology Archive:
Illinois Watch Co.

Grade: 169

False Center Bridge

Manufacturer: Illinois ?
Manufacturer Location: Springfield, Illinois ?
Movement Serial Number: 5464231 ?
Grade: 169 ?
Model: 9 ?
Estimated Production Year: 1931 ?
Run Quantity: 1,000 ?
Grade/Model Run: 4 of 5 ?
Grade/Model Total Production: 5,190 ?
Size: 16s ?
Jewels: 19j ?
Movement Configuration: Openface ?
Movement Finish: Nickel ?
Movement Setting: Lever ?
Plate: Bridge Plate ?
Bridge Type: False Center ?
Double Roller: Yes ?
Barrel: Going ?
Adjusted: Yes ?
Adjusted # of Positions: 3 ?
Adjusted to Temperature: Yes ?
Railroad Grade: No ?
Dial Feet Locations: 17.5, 39.0, 58.0 ?
Case Screw Locations: 3.0, 38.0 ?
Case: Various ?
Run ID: 12681.169G4.16S4099.169M741.O7235.L7167.19J796 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 13 (1.30%) ?