SACHSENHAUSEN, command KLINKERWERK, Prisoner folded letter with statement from the camp rules from Oranienburg 29.3.42 to Teschen, the sender with addition \"Kl\" for command Klinkerwerk, a satellite camp in the approximate lain Gro+?ziegelwerk with high wastage at Persons, censorship single circle postmark \"postal service censorship place E / K. L. \"