Old No. 32, The Marmon "Wasp"
"Featuring an image by artist John Mattos, the stamp depicts Ray Harroun driving No. 32, the Marmon 'Wasp', the customized yellow-and-black car in which Harroun won the first Indianapolis 500 in 1911," writes reporter Rodney Richey in Indiana's Herald Bulletin.
The article goes on to say, "Ray Harroun was a mechanic who drove the Marmon 'Wasp,' which he designed, to victory in the first race. That car featured another feature he invented: the rearview mirror."
As a result, Harroun was the first driver to race without someone else with him to watch for cars from behind according to a writeup on the Marmon Group website.
A part-time racer, Harroun worked for the Marmon Motor Car Company, an early 20th century producer of passenger cars. Built from stock Marmon engine components, the "Wasp" was built with a smoothly-cowled cockpit and a long pointed tail to reduce air drag unlike most race cars of the period.
To read the entire article, click here.