Drawings and Sculputres after Lost Models (not from the Von prau Collection)
Drawing by Granacci after lost Michelangelo Model, "Thief on a Cross"
Wax model of Giuliano de Medici in Edinburgh, Scotland This model is reported to be be fake by "art experts" around 1912 I don't know why this model was declared to be a fake but, who knows this may be the real thing.
Detail of a drawing by Joseph Heintz, about 1592, after Michelangelo's lost model for the "River God", Albertian, Vienna