Well Ya' can't fault me on that!!! I've only seen 'em twice in my life.... Once on a pre-WWII car (something about tires hard to come by during the war, let alone white walls), AND in Warshawsky catalog!!!! Both times in the '60's and I was in H.S.
P.S. Warshawsky and J.C. Whitney were big auto supply houses based in Chicago, and had EVERYTHING you would need for ANY motor vehicle. If they didn't have it ,You didn't need it!!!
Im sorry to say portawalls are still being used (mostly with VWs) and are still super ugly (imo), Actually I saw a guy with a 48 chevy excited about picking up a vintage set for 200 a month back. I personally think they are hideous and call them "flappers" since that is the noise they make when you drive on the freeway.
That was fun, lets try another one... "Bulk oil" where did you buy it, how much was it, and what container did it come in.....let's say in 1963
Bulk oil came in a 55 gallon drum and was dispensed into quart glass jars with a screw on funnel top by means of a hand pump (27 to 35 cents a quart depending upon the grade of oil). I still have one, along with two sets of oil "can" spouts that you used to push into a cardboard fiber oil can with a rolled steel lid for a top and bottom. One of the two was a funnel with a long steel goose neck and has a pistol grip that pushed the oil can onto the piercing tool, the other is the usual gas station push spout