Johann Kupetzky1737 · Mezzotint in black on ivory wove paper36.4 × 26.4 cm (14 3/8 × 10 7/16 in.)Art Institute of Chicago
WattsOSPOPortrait of P. L. Wittwer1735 · Mezzotint on cream laid paperImage/plate: 35.3 × 25.3 cm (13 15/16 × 10 in.); Sheet: 36.7 × 26.6 cm (14 1/2 × 10 1/2 in.)Art Institute of Chicago