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Guild Home > Calibers > Benrus > Benrus BK

Benrus BK Movement Specifications, Beat Rate & Dimensions

BENRUS • Benrus BK DIAMETER: 25.4 mm | JEWELS: 17 Jewels | FREQ: 18,000 BPH ARCHIVE SPEC
Original Horological Blueprint • Benrus Benrus BK Architecture

Technical Caliber Datasheet

ManufacturerBenrus
Caliber ReferenceBenrus BK
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)25.38 mm
Height / Thickness4.15 mm
Jewel Count17 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementSwiss Lever
Production Period1950

Historical Reference & Restoration Notes

The Benrus BK 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.

Restoration enquiries:
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