Bought at estate auction in London 1970s, hand stamped, handmade goblets, each slightly different dimensions but close to same, only one in set of 13 had artist's initials on lower rim
Sorry to tell you, the goblet is silver plated, "EPN" stands for " Electro Plated Nickle". All English sterling silver is stamped with a series of Hall marks to indicate the year, maker, city etc.
Re: silver goblet