Trying to find out the brand/model of the sunglasses worn by David Bowie in the movie "The Man Who Fell To Earth" from 1976. Here are a couple links to film stills of the glasses.

http://maxsreview.files.wordpress.com/2009/06/screen-capture-2.png?w=500...

http://www.flashglamtrash.com/gallery/p-12-1071.jpg

Note : The lenses are photochromatic (change shade from light to dark in the film but i think this is a special effect.)

Good luck.