This is a rare EAPG National Glass Model Flint Ribbed Spiral TUMBLER made of Opalescent Glass. Pattern #911. Produced in America around the turn of the 20th century, this vintage piece features a round shape with a ribbed spiral pattern. It is in great condition, but it does have a very small flake or flea bite on the base rim. Please see last photo. Tumblers in this pattern are difficult to find and this
Yellow Uranium Glass Custard Top Tumbler Cup Round 3in Dia x 3.5” H