Porsche Design by Orfina Military assigned chronograph ref 7177 1980 Movement and functions Cal 5100 automatic Lemania 17 jewels. Daydate chronograph Case Stainless steel, round pushers with screw back 41mm Dial Three registers black dial with tritium applied luminous indexes Features Military assignation outside the caseback, the 3h red logo on the dial means that the dial is tritium lumed. Dial, case and movement signed. Case back engraved with military assignation number.