Strange as it may seem, Heuer did make this version of the Autavia (2nd execution screw-back case) with a 24-hour bezel, even though this chronograph had no extra hour hand (for GMT, second time zone, etc.). {do not confuse this with the Autavia GMT, with the red / blue bezel and additional hour hand.}

However, the one listed on ebay does not have the correct 24-hour bezel, and the pushers do not appear to be correct. So, YES -- Heuer did make one with this type of bezel, but NO -- this is not the correct bezel.

Jeff