It seems that the usual car enthusiast watch is just an average watch with a watch face containing a car logo. For example, many Ferrari watches and Porsche watches follow this pattern. Ho hum.
Earlier in this thread I posted pics of two watch makers who each went a different path:
http://www.columbusracing.com/forums/showpost.php?p=1311685&postcount=125
Now I see advertised a true watchmaker's tour de force, a tourbillon watch. I've always admired the ingenuity of watches with complicated mechanisms, but of course, I can't afford a quality one. A tourbillon is an addition to a clock's escapement originally developed to negate the effects of gravity and in theory to improve accurancy. If you want to know more about that, here's your link: http://en.wikipedia.org/wiki/Tourbillon#Modern_tourbillon_watches
The Chopard Engine One Tourbillon is the first car design watch I've seen that combines a tourbillon with car design elements, not just a brand logo. At least it's the first such watch I've liked. The power reserve indicator looks like the fuel gauge of a German car. I also love the valve covers. Way out of my price range, but thought you might enjoy the eye candy:
http://i355.photobucket.com/albums/r445/martyr65/watch1.jpg
http://i355.photobucket.com/albums/r445/martyr65/watch2.jpg
http://i355.photobucket.com/albums/r445/martyr65/watch3.jpg