Up untill the 20th century the Von Praun models were accepted
as being originals by Michelangelo. When art experts
(wanabe artists) examined the Von Praun models for the
Haehnel (2nd owner of the models after Von Praun) estate sale they compared the compared the models to the statues and looked for
differences. The were probably unaware of the paper trail going back to
Michelangelo. In 1913 the models were apprasied at US $338,716.
For example, in the terracota Michelangelo plaquette in the Santa Barbara,
the art expert Thode in his 1913 article on the the Haehnel Collection
(Von Praun) did not consider this to be by the hand of Michelangelo. Thode
stated that the "muscles were to strong and too unpleaseant - exagerated
in the manner of the sculptor Bandinelli (1488-1569)."