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The brand's maker, Tonino Jacono, is the brother-in-law of Vitaliano Posella. Grading is based on chess pieces, rising in order through Knight, Bishop, Rook, Jack, Queen, and King; the letter "E" denotes surface finish, and "Checkmate" denotes an unusually large size. Starting in 2011 the year of production has been stamped as a two-digit number, and that same year a silver logo began appearing on stems.