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Guild Home > Calibers > Waltham > Waltham 870

Waltham 870 Movement Specifications, Beat Rate & Dimensions

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Technical Caliber Datasheet

ManufacturerWaltham
Caliber ReferenceWaltham 870
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)19.7 mm
Height / Thickness3.4 mm
Jewel Count21 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementSwiss Lever
Production Period1936

Historical Reference & Restoration Notes

The Waltham 870 is a celebrated example of vintage precision engineering. Featuring 21 jewels and operating at 18,000 BPH, surviving examples are prized by collectors and restorers. For further technical reference on vintage watch movements, consult the NAWCC horological library.

Restoration enquiries:
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