addition info :
- DS Action Ref : C536.7178.42.11
- sapphire crystal anti reflecting
- screw down crown
- bracellet - folding clasp
Certina continued to expand and by 1955 the company had 500 employees working between the factory and offices and produced 1000 timepieces every day. Certina worked up a new business plan that expanded its operations and was at the time considered the most modern and best equipped watchmakers in the world. In 1959 Hans and Edwin Kurth set themselves the objective of creating a brand new niche marketplace based on quality through engineering and technical designs. From this objective Certina created the concept of suspending a watch movement inside a highly reinforced case, which they named DS for "Double Security". The DS line were the first watches to raise the water resistancy and shock protection down to 6m (previous watches were set at 2.2 meters), this placed Certina at the forefront of its trade. The Certina DS watch was taken up the Himalayas by a Swiss team who climbed the Dhaulagiri and the watch withstood all changes in pressure and altitude.