The letter, dated Aug. 22, 1944, describes permission to move Schindler's enamelware factory and its workers from Krakow, Poland, to Czechoslovakia. Historians say that move allowed him to carry out the rescue chronicled in the movie "Schindler's List."
It's believed to be the first known document confirming the move.
The letter was offered along with a worker medical transfer document by RR Auction in Amherst, N.H. The auction, which ended Wednesday, also offered the Krakow factory blueprints.
RR Auction says one person, who wishes to remain anonymous, purchased all of the documents.