50 Pfg. Red overprint, horizontal pair as properly franked multiple franking on air mail letter from BERLIN SW 11, 27.8.49 to the United States, photo expertize Schlegel BPP (2022) : \"genuine, allied military personnel was it allows, air mail letters through the Berlin magistrate post to to consign. Foreign currencies air mail letters received the rubber cancel \"airmail\" (5, 2 cm), only used in the West Berliner post office SW11, traces of use, right stamp at the bottom on the right ripped\"