They attempted to send by post a prized family possession, the original score of the fourth movement of Beethoven's String Quartet No.

The expert recognized Beethoven's handwriting, but in order to save the manuscript from being looted he lied to the Nazis and said it was not authentic.

[3] The Nazis seized most of the Petschek family's assets and possessions, which Czechoslovakia's Communist regime nationalized after the war.

Franz Petschek, who had run the family's mining businesses in Czechoslovakia, tried from his new home in the US to get the piece back but got scant sympathy from the Communist government.

[3] In August 2022, the Moravian Museum di take the decision to return the manuscript to the heirs of the Petschek family, adhering to the Terezin Declaration which urged governments to make every effort to return former Jewish properties confiscated by the Nazis, fascists and their collaborators to their original owners.