Pierce “DuoFon”

Swiss Watch Fair 1964
Versatility is embodied in this all-new wrist alarm watch. It has no less than two alarm systems, easily regulated. One is a conventional alarm with clear ringing tone. The other, designed for when the wearer does not want to disturb others, such as a conference, an interview, etc. is by noiseless vibration on the wrist. A disc showing red or white at the base of the dial indicates the setting of the alarm systems. (PIERCE “DuoFon”)