Model: AutaviaReference: 3646Date: Circa 1969Movement: 17-jewel Valjoux Cal.92 manual windDial: Third execution black, signed Gübelin, applied polished baton hour markers, white outer 1/5th second divisions with luminous dot 5 minute markers, silvered subsidiary dials at 3 and 9 for constant seconds and 45 minute recording, polished pointed baton hands with luminous inserts, centre chronograph handCase: Second execution polished round, screw down back, bi-directional bezel with black calibrated insert, twin chronograph pushers, No.82882Strap/Bracelet: Black leather Buckle/Clasp: Stainless steel buckleSigned: Case, dial & movementSize: 39mm