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From the American Horology Archive:
Illinois Watch Co.

Grade: 163 Bunn Special

Mixed Run: Type I, Type IIE, Type II, Type IIE (Model 14 & Model 15)

Manufacturer: Illinois ?
Manufacturer Location: Springfield, Illinois ?
Movement Serial Number: 5420107 ?
Grade: 163 Bunn Special ?
Variation: 163 Type I ?
Model: 14 ?
Estimated Production Year: 1931 ?
Run Quantity: 600 ?
Grade/Model Run: 6 of 6 ?
Grade/Model Total Production: 4,600 ?
Variant Est. Production: 3,600 (16S-M14-23J-ONL-U-163 TYPE I) ?
Size: 16s ?
Jewels: 23j ?
Movement Configuration: Openface ?
Movement Finish: Nickel ?
Finish Pattern: Ray ?
Movement Setting: Lever ?
Plate: 3/4 Plate ?
Double Roller: Yes ?
Barrel: 60-Hr. Motor ?
Adjusted: Yes ?
Adjusted # of Positions: 6 ?
Adjusted to Temperature: Yes ?
Adjusted to Isochronism: Yes ?
Railroad Grade: Yes ?
Dial Feet Locations: 17.5, 39.0, 58.0 ?
Case Screw Locations: 3.0, 38.0 ?
Case: Various ?
Run ID: 12648.G6.16S4089.1614M142.O7222.L7157.23J294 ?
Database Version: v52.978 ?
Advanced Metrics
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Registry Population: Scoped for This Run Only: 20 (3.33%) ?
$ Estimated Value (12 Month Change): -14.35% Analyzing 134 Sales ?
Research Note: Mixed Run: 163 Type I and 163 Type IE [Chamelin].