There was a department store in Pittsburgh called Mansman's, that sold what department stores sold in those days, clothes, pots, pans, fabric, shoes, hats etc. My uniform socks (forest green knee socks.) always came from there, and they, like everything else we bought there, came with green stamps.

My mom got all kinds of things with them at the redemption center on Highland Avenue. I got a fish tank (and cat television) with green stamps once.