Thanks!
There's a story behind those. When Dad bought his '73 had a full set of Jackman white spokes with summer road tires on them. (He had deep steelies painted to match the truck w/ desert dogs for winter-see pic).
Jackmans were unique b/c the 'spokes' were welded right to the outer ring/rim, plus the steel is more of a structural, thick guage. (as opposed to a stamped ring with triangle cutouts for the spoke effect, then that welded into a outer ring/rim)
Anyway, we had a situation where one got trashed, so I went on a multi-year search to get the 1 replacement. I found a very trashed '77 that was for sale with a full set, asked the guy if he'd consider trading wheels, and he said no.
Eventually several more years later I saw that '77 again and it had been sold and was in worse condition. I approached the new owner and he was willing to trade.