70s vintage smoke brown glass tumblers, Libbey Impromptu 16 oz drinking glasses set

Set of six 16 ounce size (about 5 1/2" tall) drinking glasses, Libbey tawny brown glass, 1970s vintage. Pattern is Impromptu, very mod!

These are all in very nice condition, clean and bright without scratching or clouding. These large tumblers are are to find in the tawny smoke color, and this is a lovely set.