This document is entitled “The Progression of Events of 20 July 1944”; it was auctioned on January 31st.
The six-page typed document contains the eyewitness account of General Adolf Heusinger describing the events of July 20th, 1944. Heusinger was in the Wolf’s Lair, standing next to Adolf Hitler when a bomb contained in a suitcase, planted by Claus von Stauffenberg, exploded, killing four men and injuring Hitler himself.
The overall plot to overthrow Hitler and take control of the German military was a modification of an official plan to continue government operations in the event of a breakdown in civil order. The plan was named “Unternehmen Walküre”, or “Operation Valkyrie”.
Booktryst has more information on the document and its contents.