KL Auschwitz - Prisoner letter sent from concentration camp to family 1944

Good example of KL Auschwitz letter form , censorship stamp , missing stamps ( probably take out from censor )

Letter sent 2 month befor transered him to KL Sachsenhausen

Ojrzanowski, Władysław
(prisoner number: 111559)

born: 1917-09-25, place of birth: Katowice

Fate:
1. 1943-03-31, Auschwitz, arrived to camp
2. transferred 29.10.1944 to KL Sachsenhausen, then to KL Buchenwald (96393), liberated 11.4.1945,