Free Day

I am doing my pre-Christmas house cleaning today. So no real post just pictures and a question. When did U.S. postage stamps start looking like stickers for a kid's sticker book?


(Left to right, top to bottom: 1953 Studebaker Starliner, 1955 Ford Thunderbird, 1954 Kaiser Darrin, 1953 Chevrolet Corvette, 1955 Ford Thunderbird, 1952 Nash Healey, 1953 Chevrolet Corvette, 1953 Studebaker Starliner, and large 1953 Chevrolet Corvette)

Note:Go to the Postal Service site and click on any one of the stamps to see a larger photo.