Eterna-SONIC “Kon-Tiki”

Swiss Watch Fair 1970 BF 941
This sturdy sports watch contains an electronic movement presented for the first time at the 1970 Basle Fair. It incorporates a new type of sonic resonator, one feature of which is the discreet whistling sound - replacing the traditional ticking sound - its rapid vibrations (300 times per second) produce. Other characteristics are its great precision and imperviousness to changes in position. Ali-stoel case, with water-resistance guaranteed to a depth of 200 metres, Screwed-down crown. With calendar. (ETERNA-SONIC “Kon-Tiki”)