You've seen an old Duesenberg or Bugatti before, but chances are you've never seen a 1938 Hispano-Suiza Dubonnet, and that's because only one was ever made. And Peter Mullin's got it in his museum.
The one-off car's mechanics were designed by Andre Dubonnet, a playboy inventor, racecar driver, Olympic athlete and ace WWI pilot, and the coachwork was executed by Jacques Saoutchik, a luxury coachbuilder based in Paris.
The Mullin Automotive Museum's only open two days a month, but when you're an autmotive enthusiast as well known as Jay Leno, you can presumably swing by whenever you'd like. Leno and a camera crew from his Jay Leno's Garage website visited and shot tons of photos of the HS Dubonnet, well worth a gander here.
Check out The Mullin Automotive Museum, Part 1: Carlo Bugatti Furnishings Collection