Wow!! I haven't seen a belted T/A since the early 70's.
I hope that they are only for show.
50 year old tires especially from that time, don't do well at hiway speeds. Bad separations can occur.
They were still making them in the mid 80’s. We had to run them on our circle track car. We had a connection with a large distributor and we’d go through piles of tires looking for the freshest ones.