13. Heuer. A fine and rare stainless steel manual wind chronograph bracelet watch Model: Autavia 'Mario Andretti' Reference: 3646 Date: Circa 1960 Movement: 17-jewel Valjoux Cal.92 manual wind Dial: Black, applied polished baton hour markers, white outer 1/5th second divisions, sunken engine-turned subsidiary dials at 3 and 9 for running seconds and 45 minute recording, polished pointed baton hands with luminous inserts, centre chronograph hand Case: Polished round, screw down back, black graduated bi-directional bezel, crown flanked by twin pushers Strap/Bracelet: Stainless steel link Buckle/Clasp: Steel folding clasp Signed: Case, dial & movement Size: 39mm The Heuer Autavia model was first introduced in 1962, the name deriving from a combination of "AUTomobile" and "AVIAtion". The ref 3646, nicknamed "Mario Andretti", is a legendary watch from the 1960s. It owes its name to the iconic racing driver, who wore one on his wrist during his greatest achievements. With a 39 mm case, it strikes a perfect balance between elegance and robustness. Its matte black dial, accented by two white registers, ensures outstanding legibility. The 12-hour rotating bezel highlights its sporty and versatile character. Powered by the Valjoux 92 movement, it embodies the mechanical watchmaking of its era. Now rare and highly sought after, it stands among the most emblematic Autavia models. A symbol of speed and precision, it represents the strong bond between Heuer and motor racing.