The cars pictured are all marques that fall into the "Classic" car category. This designation is given to certain marques based on design, price, appointments; Packard, Cadillac, Auburn, Cord, Deusenberg, Pierce Arrow, to name a few. There is a national classic car club.
Any car over the age of 25 years can be registered with the AACA (Antique Auto Club of America.
My dad and I owned a couple of antique cars years ago. Had a lot of fun on tours, shows, etc.. My wife and I had all antiques in our wedding. We rode to the reception in the rumble seat of a 1931 Caddy V-12 coupe.