Vintage Pyrex Blue Band Mug Set

Vintage Pyrex blue band mug set. The mugs are in good condition, but not perfect as they show slight signs of usage and age. The blue bands around the rims are vibrant in color and not faded. No dark stains or markings on the set The mugs measure about 3½" and each is stamped "PYREX brand tableware by Corning Made In USA 723-31 and 723-33 on the bottom.