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
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