This appears to be the only known example of this rare model in private hands. Zick, ibid., pp. 173-174 lists the other two known examples; one example, formerly in the Max von Goldschmidt-Rothschild Collection, is now in the Metropolitan Museum of Art, New York, and is illustrated on p. 174, the other, formerly in the Schöller Collection, Berlin, was destroyed during the war, Berlin (Inv. Nr. FB 1893).