Portrait of Guillaume Coustou, 1770, Etching and engraving; third state of five (Bocher), Sheet: 10 3/4 ? 8 3/16 in. (27.3 ? 20.8 cm), Prints, Augustin de Saint-Aubin (French, Paris 1736?1807 Paris), After Charles Nicolas Cochin II (French, Paris 171