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Guild Home > Calibers > Waltham > Waltham Colonial A

Waltham Colonial A Movement Specifications, Beat Rate & Dimensions

WALTHAM • Waltham Colonial A DIAMETER: 28.0 mm | JEWELS: 19 Jewels | FREQ: 18,000 BPH ARCHIVE SPEC
Original Horological Blueprint • Waltham Waltham Colonial A Architecture

Technical Caliber Datasheet

ManufacturerWaltham
Caliber ReferenceWaltham Colonial A
Movement TypeManual
Diameter (Lignes)—
Diameter (mm)—
Height / Thickness—
Jewel Count19 Jewels
Beat Rate / Frequency18,000 BPH
Lift Angle51°
Power Reserve38 hours
EscapementSwiss Lever
Production Period1918

Historical Reference & Restoration Notes

The Waltham Colonial A is a celebrated example of vintage precision engineering. Featuring 19 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 Fondation Haute Horlogerie reference.

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