Those aren't radial tires. They are bias belted. That is why they say Belted T/A instead of Radial T/A.
They should be like the GoodYear Poly-glas. Polyester body with fibrglass belts.
The original, genuine Radial T/a tires were practically custom made only in one BFG plant. They were all Rayon construction. @ Rayon body plies and 2 folded rayon belts giving 6 plies od rayon in the tread area.
The current T/A is in name only and built on Uniroyal green tires molded in a T/A mold.