EBAUCHES ELECTRONIQUES: Derby-Swissonic

Swiss Watch Fair 1972 BF 607
The DERBY SWISSONIC collection of electronic alarms and small clocks now includes a new model, to be marketed during the summer.
This table clock with ultrasonic alarm system is equipped with an ESA 9 120 movement fed by a 15 V. mercury power cell with an energy reserve in excess of one year. This model gives to-the-second local time in every part of the world and distinguishes between day and night. (EBAUCHES ELECTRONIQUES: DERBY-Swissonic)