Hopefully someone more knowledgeable than I am will chime in.
Are they take offs? Are they reproduction? I don't know enough to tell you.
Isn't that the size that cam on 69 Camaro SS and Chevelle SS as well as several others?
You wouldn't want to drive on them, obviously.
If they look exactly the same as an F70-14 that came on a car from that era, I would think there would be value to someone showing a restored car.
F70 14 Goodyear Wide Tread GT white letter is $415 a tire now for a reproduction.
https://cokertire.com/tires/goodyear..._7v7ARt37FkGDy
Polyglas in that size is "available" for under $300. I say that in quotes, as the two sources I found said they were on back order.