SACHSENHAUSEN, command KLINKERWERK, Prisoner folded letter with statement from the camp rules from Oranienburg 26.6.42 to Silz / Warthegau, censorship single circle postmark \"postal service censorship place G / K. L. \", the sender with addition \"Kl\" for command Klinkerwerk, a satellite camp in the approximate lain Gro+?ziegelwerk with high wastage at Persons