The anti-reflective black-coated case link quickly got attention from West German Bundeswehr and the U.S. Air Force and watches were made with a red circular "3H" symbol on the dial signifying the use of the hydrogen isotope link tritium. They also replaced the Orfina and Porsche Design logos with "Military." And on the link rarest U.S. Air Force models you can find the words "U.S. Air Force" and "Tiger" above well a tiger logo.