Interesting set including a letter sent from Deutsche Ausrustungswerke GmbH company factory in KL Stutthof near Danzig, that used slave labor from that concentration camp, dealing with the purchasing of a industrial machine. Firma Troop Krs. Stuhm, sent by Paul Radtka. The other documents are 3 identical packet shipping receipts to some Georg Radtka, who might be a relative of Troop Krs. Stuhm company Paul Radtka, who is sending the packets. Paul, was an inmate in KL Sachsenhausen ( Oranienburg ).
The other documents are 4 identical papers with address of Paul Radtka in KL Oranienburg, written on recycled unused bill notes. Maybe used to put to packets as shipping address.