Royal Scottish Society of Arts, a silver award medal by A. Kirkwood, bust of Minerva right, rev. wreath, named (To Alexr. Peters, Plumber, 13 Dundas St. Edinr., for his Improved Frost Stop Cock, The Silver Medal No.3969, 1860), 48mm (D & W 182/626; Brodie 270). Minor rim nick on reverse, otherwise good very fine and attractively toned (£60-80)