PORSCHE DESIGN. Steel men's chronograph wristwatch, "Military 3H no-radiation" model, circular case, black dial with baton hour markers, three counters, tachymeter function and date window at 3 o'clock. Articulated bracelet with folding clasp (scratches, minor bumps). Automatic movement (crown to be refastened, service to be provided). Reference. 7177, numbered: 00005022 1980's. Diameter: 4.1 cm This chronograph from the Porsche design office manufactured by Orfina Suisse is from a small series produced for NATO fighter pilots.