The earliest automobile racing occurred in Europe at the end of the 19th century. By 1910, the sport was popular in America as well. The Indianapolis 500, first held in 1911, has been run every year except for a brief interruption caused by World War II. Collectors search for both Formula 1 and NASCAR items, with pre-1945 materials the most desirable.
References: Mark Allen Baker, “Auto Racing: Memorabilia and Price Guide,” Krause Publications, 1996; James Beckett and Eddie Kelley (eds.), “Beckett Racing Price Guide and Alphabetical Checklist, Number 2,” Beckett Publications, 1997; David Fetherston, “Hot Rod Memorabilia & Collectibles,” Motorbooks International, 1996; Jack MacKenzie, “Indy 500 Buyer’s Guide,” published by author, 1996.
– Harry L. Rinker
“Official Price Guide to Collectibles”