This is not Depression era glass ware but instead is classified as Early American Pattern Glass (EAPG). The pattern is called "Ribbed Spiral" by collectors and was made by the Model Flint Glass Company of Albany, Indiana sometime around 1899 - 1902. They just designated it as No. 911. It comes in a wide variety of pieces including the table set (cream, sugar, spoon and butter), tumblers, bowls, vases, comports, etc. It came in crystal, crystal opalescent (your piece is an example), blue opalescent and canary (vaseline) opalescent.
About the best reference around for this pattern is Albany Glass by Ron Teal.