[SmallHurst]

Information that I received from John Kelsey points to the no size polyglas.

As for set dates of when a tire was available and when it was not..... yes and no. The turnover (for Goodyear) going from the no-size polyglas to the elevated size polyglas occured starting in October of '69 and was completed in December of ' 69. Different plants producing the tires as well as the different assembly plants and the inventory they may have had stocked can result in different tires on a car built the same time in a different plant.