A very rare Heuer Autavia 740603, one of the most sought after Heuer manual wind models, this particular model was re-discovered only few years ago on the discussion Heuer forum On the dash, what is most interesting in the watch is the arabic numerals dial and the high frequency 7740 caliber, beyond other points of view the model seems to be developed for the Kenyan Air Force , in fact most of the examples are KAF issued, although not this example. The conditions of the case the dial and the hands all completely original and from the origin. Watch come on a period replica strap and buckle. Cal. 7740 uses an oscillating pinion for smooth and reliable chronograph engagement rather than the traditional horizontal clutch. The top pusher starts and stops the chronograph, while the bottom one resets the chronograph to zero. It has a semi-instantaneous date mechanism showing the date in a window at 6:00 on the dial.