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Guild Home > Calibers > Illinois > Illinois Bunn

Illinois Bunn Movement Specifications, Beat Rate & Dimensions

ILLINOIS WATCH COMPANY • Illinois Bunn DIAMETER: 28.0 mm | JEWELS: 17 Jewels | FREQ: 18,000 BPH ARCHIVE SPEC
Original Horological Blueprint • Illinois Watch Company Illinois Bunn Architecture

Technical Caliber Datasheet

ManufacturerIllinois
Caliber ReferenceIllinois Bunn
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)—
Height / Thickness6.0 mm
Jewel Count17 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementSwiss Lever
Production Period1917

Historical Reference & Restoration Notes

The Illinois Bunn is a celebrated example of vintage precision engineering. Featuring 17 jewels and operating at 18,000 BPH, surviving examples are prized by collectors and restorers. For authentic restored timepieces and bespoke pocket-to-wrist conversions, visit Bunn Special movement wristwatch guide.

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