Griswold No. 32 "Windproof" Ashtray

Up for bid is the Griswold "Windproof" ashtray. It is 4 inches in diameter at the top. This little guy was put to use, and I haven't done anything to it to clean it. I'm not sure if that would affect the value, and wouldn't want to clean it incorrectly. It's in pretty good shape and ready for the Griswold collector to give it some TLC.