Hans and Erwin Kurtz develop the pioneering concept DS (Double Security) at Certina
, in which the movement is included in a kind of highly robust safe. As a result of this wristwatches with self-winding
movements can for the first time resist a free fall from 1.8 to 2.2 meters on hard ground.
introduces the revolutionary one-shell-case with the Star Ocean
. Hereby the current problems of the case to be waterproof
can be eliminated.
← 1958 | 1960 →
1959.txt · Last modified: 11.10.2021 17:03 (external edit)