Everything listed for '52/'53 with the 6 x 8.75" pattern is a Motor Wheel product, thus hub piloted. Early '40s 450s used dual cap nut (DCN) type Budd wheels, but that's it. Bigger trucks used them too.

Your MW #83113s are 20" x 6.5" having a Goodyear "L" type locking ring rim design. They have 5.75" dish with hub piloted 6.25" center bore. Stu