Two matching sets of three George III wine coasters

Two matching sets of three George III wine coasters, fret pierced around the sides with anthemion-like motifs below a gadrooned wire, inset wooden bases, all by Robert Hennell, London, (three hallmarked for 1773 and three for 1792), 5in (12.5cm) diameter. (6) Bearing: The centres of five engraved with the coat of arms of the 4th Duke of Leeds and one engraved with the arms of another Duke of Leeds probably the 5th Duke and his wife and the Fauconberg & Conyers inventory Nos.