Breitling Navitimer Chronograph 

Circa Late 1960's

Reference 806

Black Dial

Beautiful patina of dial and hands. 
Polished case.
Matte GB alligator black strap with yellow stitching.
Just serviced with replaced parts to the Venus movement including Valjoux and ETA parts.

After Venus went out of business in 1967, it was purchased by Valjoux and subsequently by ETA.