Model: Autavia SiffertReference: 1163Date: Circa 1970Movement: 17-jewel Cal.11 automaticDial: Silvered, applied black accented polished baton hour markers, black outer 1/5th second divisions, blue five minute markers, black subsidiary dials at 3 and 9 for 30 minute and 12 hour recording, date aperture at 6, polished pointed baton hands with luminous and blue accents, blue centre chronograph handCase: Brushed and polished tonneau form, screw down back, calibrated black bezel, winding crown at 9, twin pushers at 2 and 4, No.141489Strap/Bracelet: Stainless steel Gay Freres link braceletBuckle/Clasp: Signed folding clasp stamped '3 69'Signed: Case, dial & movementSize: 42mm Accompaniments: Heuer box