Like the Carrera Chronomatic this is a rare variant, with perhaps only around five are known to exist and it offers a superb contrast to the white dialed "Siffert" Autavia. The later standard production dial watch was later called the "Derek Bell" which then morphed into the highest volume seller the "Viceroy" Autavia...In terms of numbers, its one extreme to another!

Chronomatic Autavia  1163MH

DerekBell Chronomatic RCno1 copy