The Accutron, an electromechanical watch developed by Max Hetzel and manufactured by Bulova beginning in 1960, used a 360-hertz steel tuning fork as its timekeeper, powered by electromagnets attached to a battery-powered transistor oscillator circuit. The fork provided greater accuracy than conventional balance wheel watches. The humming sound of the tuning fork was audible when the watch was held to the ear.
The Accutron, an electromechanical watch developed. by Max Hetzel and manufactured by Bulova beginning in 1960, used .a 360-hertz steel tuning fork as its timekeeper, powered by electromagnets attached to a battery-powered transistor oscillator circuit The fork provided greater accuracy than conventional balance wheel watches The humming sound of the tuning fork was audible when the watch was held to the ear.