1937 Mercedes-Benz 540K Special-Roadster
Built by Mercedes-Benz from 1935 to 1940, the 540K Special0Roadster the Friedrich Geiger designed car was a development to the 500K, itself a development of the SSK.
This is really a spectacular example in pristine condition. According to Wikipedia they only produced 58 of these as roadsters, so this is indeed one of the rarest cars. I love the long lines, sweeping finders, chrome accents and exposed side-exhaust piping. I also love the lines of the rear bumper - they just don't make anything as elegant...
Next up: 1938 Alfa Romeo 8C2900B Touring Berlinetta