The "Birdcage" nickname for these Maserati racecars was suggested by a distinctive lightweight chassis made from narrow tubing. The car's in-line four-cylinder engine was mounted at a slant, allowing the hood to sit as low as possible between the car's bulging fenders.
This particular Birdcage was driven by racing legends Carroll Shelby, Stirling Moss and Dan Gurney among others. Together, Moss and Gurney drove the car to victory at Germany's Nürburgring. Much later, those two drivers autographed the car and their signatures can still be seen.
An association with actor McQueen can multiply the value of a machine.