12 Pfg. Berlin bear, sawtooth-like rouletted, \"u\" paper, vertical gum rippling, horizontal left margin pair with additional franking (no. 2, 3, 4 pair, 6, 7, always A) properly franked on registered letter the 2nd weight step from BERLIN CHARLOTTENBURG 11.6.46 to Siegburg, pair crumpled bends, right stamp slightly round corner, cover centered vertical folded (through 6 Pfg. -stamp), left negligible opening shortening, as usual custom traces, photo expertize Ströh BPP: \"genuine, stamps this type are already used very rare\", possibly unique! Michel - .