Re: -GoodYear, 2- PolyGlass GT's, 2- WideTread GT'
My guess is that the Polyglas tires are pre'71, by virtue of the fact that they're "no size". Since the F60 Polyglas changed from no-size to sized in early calendar 1970, I'm assuming the other sizes changed around the same period.
You might try contacting Kevin Suydam via his website. He bought my H60 Polyglas pair a few years ago. I think I got $200 or so for the pair back in '04.
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