As long as they got to the track, the variety of rig or trailer wasn't important

I dig these early 50's trucking car transporter trailers, but the only one I've seen in person is the one the Dunkel Brothers restored http://justacarguy.blogspot.no/2013/06/coolest-transporter-ive-come-across-in.html

pretty interesting idea for a trailer!

that unusual early trailer that only had one axle, and was a lot shorter than todays standard.

Found on http://www.trackforum.com/forums/showthread.php/144452-Indy-car-transportation