Email from my dad's tire warehouse buddy.
"Unfortunately that's a Coker Tire, Lucas Classic Tires or possibly M E Miller Tire:
Coker Tire - Buy Vintage Tires and Wheels
Lucas Classic Tires
m. e. MILLER tire
When checking them out be sure and get the tube and flap needed too!
Word of caution though, the rims on them may be the true "split rim" not to be confused with what you probably know as "lock ring" style wheels, or they could be one's that connect in the center via a band that keeps the 2 pieces together. Regardless of what they are I'd be very suspect of their safety and unless a standard lock ring style wheel would NOT put them together NFW. I'd do whatever it took to change it over to tubeless 245/75R22.5, 265/75R22.5, or 9R22.5's etc in order to assure they didn't blow up when mounting or using the vehicle. Imagine being in a parade and it came through all decked out looking awesome and suddenly the wheel comes apart scattering pieces into the crown...shudder."
He says to be careful with those wheels and tires... they could be even more dangerous than the already stupid dangerous locking split rims.
These tires are not cheap. If you can, I would try to find a substitute with safer wheels like he says. I'm scared of locking split rims... more so of ones that don't lock at all... many men have died mounting tires on those Godforsaken wheels. Some shops that still stand today have remnants of one of those explosions. Some have teeth and pieces of the jaw/skull in the ceiling as well.