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 proximity lain large brick plant with high wastage at Persons