1942 Formula Letter From KZ Sachsenhausen to Litzmannstadt

1942 formula letter from Sachsenhausen concentration camp to the Jewish ghetto in Litzmannstadt, Poland. The letter is a folding card with instructions (see photo) to the sender and a space for a message. Sachsenhausen, in Oranienburg Germany, near Berlin, was a brutal camp, noted for extermination of Russian POW's as well as political and religious prisoners. Content mail censor office D. Uses hitler 12pf stamp. Reverse of letter has inmate's name, number, block and DOB. Overall excellent condition.