These look like my Grewal 14 vane mags that are similar to the Western Cyclone aluminum finned mags. Specs on the mags are Max wheel load 1580 lbs. with Sema 5-1A AF 345569 stamped on rear. Came in 15 x 7 and 15 x 8
inch models. Put up a thread years ago, and one reply came back that were the mags offa Mr T's van from the TV show back in the 70s or 80s.