4/7/2024 0 Comments Certina watches vintage![]() In 1969 the DS2 Super PH 500M dive watch received similar accolades, taking top scores in NASA’s Tektite underwater experiment. In 1965, for example, the DS proved reliable under all conditions in the US Navy Sealab II project. Through the 1960s and early 1970s the DS and DS2 demonstrated their resilience through a series of real-world durability trials. Starting in 1975 the DS used Certina 25-651M and 25-652M movements. In-house movements employed in the DS2 included Cal. The movement suspension was strengthened for added robustness. ![]() Among other developments the crown was partially recessed, and used a twin-seal system. The DS2 was introduced in 1968, featuring additional technical innovations. ![]()
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