They look like torque thrust wheels and the only stamping on them are (ok t&r co) it is stamped in one spoke and I can't find anything on google
Back in the 60's there was a chain of tire stores called OK Tire. Don't think they ever made any tires, but most any chain like that would call itself XXX Tire & Rubber Co to imply they were one of the big guys like Goodyear T&R, Firestone T&R, etc. My guess is that the wheels were private branded for OK Tire. Back then, everyone from JC Penney to K Mart to whoever was peddling "mags", cheapo floor shifters, and anything else they figured they could snag a few bucks on.
It could also be that OK Tire and Rubber company took a Brand X wheel to a independent foundry and told them to make one like this, but just enough different so there wouldn't be any trademark/intellectual property issues. A turret lathe and a mill in some small machine shop made a wheel from the rough casting. OK company probably didn't want the world to know they were repopping Brand X wheels, so there isn't much written history.
Are the wheels all aluminum or is the wheel steel with an aluminum face and center? If they are the latter, they might be Rocket 2 piece wheels. KK
I got new set like that in 64 or 65 for my 63 427 and they were ET's and I still have two of them. I will check to see what marking they may have.