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ETA 390 Movement Specifications, Beat Rate & Dimensions

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Technical Caliber Datasheet

ManufacturerETA
Caliber ReferenceETA 390
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)23.6 mm
Height / Thickness4.2 mm
Jewel Count15 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementSwiss Lever
Production Period1930

Historical & Mechanical Notes

The ETA 390 is a celebrated example of vintage precision engineering. Featuring 15 jewels and operating at 18,000 BPH, surviving examples are prized by collectors and restorers.

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