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From the American Horology Archive:
Illinois Watch Co.

Grade: I.W.C.

Introduced February 1893

Manufacturer: Illinois ?
Manufacturer Location: Springfield, Illinois ?
Movement Serial Number: 1360793 ?
Grade: I.W.C. ?
Model: 6 ?
Class: 7 ?
Estimated Production Year: 1897 ?
Run Quantity: 200 ?
Grade/Model Run: 13 of 16 ?
Grade/Model Total Production: 6,590 ?
Variant Est. Production: 5,990 (18S-M6-7J) ?
Size: 18s ?
Jewels: 7j ?
Movement Configuration: Openface ?
Movement Finish: Gilt ?
Movement Setting: Lever ?
Plate: Full Plate ?
Barrel: Going ?
Train: Fast ?
Regulator: Plain Inboard ?
Hairspring: Flat ?
Standard Dial Type: Single-Sunk ?
Adjusted: No ?
Railroad Grade: No ?
Dial Feet Locations: 2.0, 21.5, 38.5 ?
Case Screw Locations: 23.5, 51.5 ?
Movement Markings: I.W.Co. [or "Illinois Watch Co."] Springfield, Ill. Patent Pinion ?
Case: Various ?
Run ID: 3425.G236.18S2453.186M229.O1096.L2562.7J705 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 2 (1.00%) ?
$ Estimated Value (12 Month Change): -6.25% Analyzing 763 Sales ?