The Portland Collection, British Coins, George I, threepence, 1717, laur. and dr. bust r., rev. crowned mark of value (S.3655), certified and graded by NGC as Maundy Mint State 63
*ex Bridgewater House, Sotheby's (15/16 June 1972), lot 438 (part).
Erroneously identified by NGC as a Maundy issue.