A Antique B Vintage C American & European Classic Open D American & European Classic Closed E Pierce-Arrow F Packard G Lincoln through 1973 H Wood Bodied Cars I Race Cars J Derham Coachwork K Unrestored to 1959 L Unrestored 1955-1973 M Mini & Micro Cars N American Production: 1946 to 1954 O American Production: 1955 to 1961 P American production: 1962-1973 P-1 AMC Q American Muscle Cars Q-1 Chevrolet Corvette Q-2 Chevrolet Corvair Q-3 Ford Mustang R European Japanese and British through 1973 (to be divided based on entry mix) R-1 Mercedes-Benz Automobiles R-2 Jaguar Automobiles R-3 MG Automobiles R-4 Triumph Automobiles R-5 Porsche Automobiles R-6 Morgan Automobiles R-7 Austin Healey Automobiles R-8 Borgward Automobiles T Ford Thunderbird U Vintage Commercial to 1973 V Vintage Motorcycles W Vintage Trailers & Campers X DeTomaso Z Stationary Engines and Tractors