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AS 278 Movement Specifications, Beat Rate & Dimensions

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Technical Caliber Datasheet

ManufacturerAS
Caliber ReferenceAS 278
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)20.3 mm
Height / Thickness—
Jewel Count8 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementCylinder
Production Period1936

Historical & Mechanical Notes

The AS 278 is a celebrated example of vintage precision engineering. Featuring 8 jewels and operating at 18,000 BPH, surviving examples are prized by collectors and restorers.

Restoration enquiries:

Other AS Movements

AS 202AS 220AS 229AS 231AS 283AS 284AS 302AS 303
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