Very cool. I have a similar Breitling from around the same time.

: Hi to everybody,
: I am completely fool for my new love,a vintage Breitling Top Time
: "jumbo",38mm in diameter.
: From 1968,a rare example dedicated to motorsport by Bretling.
: Wonderful dial,domed and very racing,amazing index and great
: calibre.
: A really rare pearl fron the sixties,great value added to any
: serious collection of classic chronographs.
: Calibre Venus 178,superb column wheel mechanism.
: To my eye more attractive and bigger than a Carrera 2447,and more
: distintive at wrist.
: Next week it will go to to complete service,new glass and complete
: overhauling.
: What can i say...i'm happy.
: Wish you a nice weekend.

: