IWC Ref.3503
IWC, ocean500, Porsche joint name, model Ref.3503, diameter 34MM, Bauhaus concise artistic style, diving timing outer ring one-way rotation, all-titanium durable, once became the choice of the West German Navy, especially launched the Bundeswehr version, civilian Ocean 500, It is also extremely comfortable to wear daily. Automatic mechanical movement, 18K gold teeth ring, very heavy.
Designed by Butzi, the designer of the first Porsche 911, it is fully magnetically resistant and can also be used as a special timer for mine clearance divers to withstand water pressure to a depth of 500 meters