Vintage Nylon Chevrolet Jacket

White Horizon Sportswear vintage (50’s or 60’) jacket. Size (X)XXL. Size not clear on tag but shoulder width is 22” and chest is 57”. Pocket on left sleeve. There is a light mark below the collar in the back and four “dots” on the right sleeve near the shoulder. I don’t know the original price. My late husband’s family owned a Chevrolet dealership and this may have been a dealer/salesperson promo.