There are several different wheels that have the 5 x 5.5 bolt pattern, among them are early Ford, Jeep, 46-50 Mercury, and Ford trucks of certain years......... The 5 inch wide thing kind of rules out some of these though. Here is my guess, I think these are 49-50 Mercury wheels. They were the only ones made by Ford that have the hubcap nubs on the outside of the center section, the 46-48 Mercury wheels have the nubs on the inside and the hubcap has the male part to go into those nubs and hold in place. 49-50 Merc hubcaps are like a pan and snap OVER the nubs on the wheels.
I've never seen the ones with the eyebrow shaped vents in them, pretty cool though. Generally, car manufacturers didn't and still don't for the most part make their own wheels,but bought them from people like Kelsey Hayes and others.
I think if you can score a 49-50 Merc wheel you will have a match.
Don