Heuer Chronomatic Autavia 1163T "Real Siffert" 1969 Pre-production. calibre 11 automatic movement. The only complete chronomatic autavia available on the planet. Comes with original box and sighned papers,hang tag and caseback sticker. Original strap and buckle. Featured in "Heuer Chronographs" book by Arno Haslinger. Bought from Bonhams Haslinger collection sale 2010. POA