20 Pfg St. Maryãs Church (2) in Michel F with 10 Pfg St. Maryãs Church (4) reverse on properly franked special delivery letter from GELSENKIRCHEN BUER 1 15.2.52 to Cologne Lindenthal with arrival cancel from 15.2.52, as usual traces of usage should by of this rarity not disturb, cover with opening deficiency, photo expertize Schlegel BPP \"the letter became over the postal route transported, properly franked franked. \", rarity! - in this kind probably the only one exists!