This is from my '52 half ton long bed. The round spacer looks like it was welded on by the previous owner but the curved bracket had to be stamped into that shape at the factory. A wheel will fit over the curved bracket alone.
If he had a need to weld on that spacer, it'd be a pretty good bet that this wasn't the original bracket for this truck. I can see how it might fit on a short bed with an indented fender. Anyway, it's different than the other brackets so far. Hope this helps.
