3 Pfg first issue of stamps for Germany after WW II., blue-violet, perforated L 11½ : 11, lower margin 4-block reverse on properly franked letter, with an additional stamp (short corner) and strip of three gray violet on front from GREVENBROICH 20.5.46 to Neuss, photo expertize Hettler BPP: \" genuine, letter usage / aging traces\", Michel 680.-