A Antique
A1 Steam Powered Car
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 1960-1973
M Mini & Micro Cars
N American Production: 1946 to 1954
O American Production: 1955 to 1961
P American production: 1962-1973
Q American Muscle Cars
Q1 Corvette
R European Japanese and British through 1973 (to be divided based on entry mix)
S Model A Ford
T Ford Thunderbird
U Commercial
V Motorcycles
W Vintage Trailers
X DeTomaso
Y Amphicar
Z Stationary Engines and Tractors