I have. Cup? That reads JAMES W. TUFTS, BOSTON, WARRANTED, QUADRUPLE PLATE 1300. ANY INFORMATION AND What its worth?
Your cup? is electroplated. Quadruple indicates that it underwent 4 separate plating operations, so presumably started off with a better than average plating depth. Electroplate has little commercial value; you may be able to find something similar in eBay’s completed auctions to give you some idea of value.