[blucar]

The majority of the wide five wheels will have the date/manufacture, Ford or KH with month/year stamped into the back side of the bead area, generally at 6 o-clock from the valve stem.
I would doubt very much that there are very many Standard Series 16 x 3.5 wheels exist now. The 550 x 16 tire would have been an odd tire size in '36, most people would have opted for the 600 x 16 tire