IWC Schaffhouse “Ocean” - Porsche Design

European Watch Clock and Jewellery Fair 1983 BF 208
This new diving watch has been ordered by the West German Navy. It relies on advanced watch construction technology to achieve guaranteed water-resistance to a depth of 2,000 m : titanium case, platinum and silver gaskets, triple-gasket screw-lock crown, 3.4 mm-thick sapphire crystal... The case contains a self-powered watch movement : a high-frequency (28,800 vph) automatic design with a 40-hour power reserve. (IWC Schaffhausen “Ocean” Porsche Design)