Derby-Vox

Swiss Watch Fair 1967 BP 101
Both these small table-clocks are driven by a novel battery-powered electronic movement fitted with shock-absorber. On the left: with center seconds-hand and calendar. On the right: alarm-clock with electronic sound signal modulated by the balance-wheel and transmitted by a miniature loudspeaker (sound signal lasts 1 minute). (DERBY-Vox)