A VERY RARE GENTLEMAN'S STAINLESS STEEL HEUER AUTAVIA CHRONOGRAPH WRIST WATCH CIRCA 1970s, REF. 73663Â "JO SIFFERT COLOURS"
D: Silver "panda" dial with part luminous black inlaid silver batons & hands, outer tracking with blue markers, blue centre chronograph hand, three black registers recording hours, minutes & continuous seconds. M: 17 jewel manual wind movement signed Heuer-Leonidas SA, Valjoux calibre 7736. C: Tonneau shaped case with rotating tachymeter bezel, signed Heuer-Leonidas SA, numbered, Heuer crown & pushers, case diameter measures approx. 43mm. S: Black leather strap.