Heuer Autavia Chronograph Tropical Brown Dial ref. 73363 20-20 with a clasp stamped ‘4

with a clasp stamped ‘4 66’ and reference 516 endlinks

but it refers to a British unit of measurement

- Comes on the pictured Bulang and Sons strap with Steel Rolex buckle

with two sub dials at the bottom of the dial and a wide date window at 12

- Serial 557xxxx dating to 1978

Heuer Autavia Chronograph Tropical Brown Dial ref. 73363 20-20 with a clasp stamped ‘4The story of the Heuer Autavia began in 1933 as a dashboard stopwatch designed for cars and aircraft, its name derived from AUTomobile and AVIation. Reimagined in 1962 by Jack Heuer as a wristwatch, it quickly became a legendary motorsport chronograph, celebrated for its outstanding legibility, rotating bezel, and close association with Formula 1 greats such as Jo Siffert. The Autavia continued to evolve, most notably in 1969 with the introduction of