Pictures would certainly be welcomed here.

Try Rich C's Heuer Price Guide as a starting point.

http://www.heuerpriceguide.com/#/autavia-70s-80s/4561057249

Cheers,

Jim

: I'm hoping that someone here can give me an idea of what I have and
: what it might be worth.
: I have what I think is a Heuer Autavia 73663 Siffert model watch
: based on the information that I have found here.
: I'm brand new to this so please be kind!
: The watch is a manual wind, screw on back, white face with 3 black
: dials.
: The number in the case between the lugs one one end is 73663, the
: other end is 200004.
: I will post some pictures shortly.
: Any ideas?