Q: I have a silver tray marked “Benedict” and “Georgian.” Between these two names there’s a diamond-shape mark with “E.P.N.S.,” “B.M.M.,” “Period” and “Plate” written along the four sides. It is also stamped with the number “1758.” I’ve seen a similar tray online and the seller said that’s the year the tray was made. Can you tell me something about the maker and how old my tray is?