Rolex. A rare stainless steel cushion shape military divers wristwatch made for the German Navy. Circa 1940. This watch is known as the "Kampfschwimmer" as the German military divers used them during activities in the Second World War. 17-jewel Cortebert nickel plated lever movement, matt black dial with luminous baton markers and quarter Arabic numerals with closed 6 and 9, luminous baton hands, water-resistant type patented case with later crown.