they could be magnesieum rims
they could be cast alum as well
those look like some older hildabrands maybe
seen those on old funny cars and hot rods back in the day,maybe some ferds also IIRC
the more I looks at them I think they are for ford rustangs,might be E/T mags or some sort like the torque thrust wheels that are big on rustangs
they way its gray/back but has the polished band around it look like the are magnesieum
are the 4" wbp?
unilugs or what?
could be a western auto knock off of some drag wheels maybe
like keystone copys,clean back side with a wire brush and see if there is any marks cast in them
nice score though!
keep having raiders come to mind along with the torque thrust rims
even looks like the wheels that are on the batmobile....and I thinks thats where I remember those from now....think about it..I bet they are the same