1928 Good Year Tire Sales Award

This is a sales award presented by Good Year to my grandfather during a 1928 promotion. He owned/operated an auto supplies store and gas station in Flint, Michigan for many years 1925-1965. It looks to be a bi-monthly award, so probably not rare, I imagine many presented across the U.S. But I haven't been able to find anything like it doing minimal research. The plaque has a cool old Good Year logo and I've always loved this thing. I'm wondering if anybody has any comment, knows anything about this award, any opinion as to value? Always appreciative to hear from those with the knowledge. Thanks.