”Johann Thomas Richter” (1728-1773)
Canvas 62 x 51 cm.
Auktion Lepke, Berlin, Nov 11 1913, lot no 126.
Bukowski Auktioner AB, auction 317, Oct 18-19, 1939, lot no 89.
Ekhart Berckenhagen, ”Anton Graff - Leben und Werk”, 1967, listed in the artists works of art, cat no 1161, p. 310.