Heuss and numeral 1960, 8 Pfg Z 1 Pfg in type YII in mixed franking with 1 Pfg 5 Pfg in type X as correctly franked on addresses test from "Kassel" to Oberhausen, photo expertize H. D. Schlegel BPP (2018) : "quality: slight traces of usage" (by a commercial document entirely insignificant), Michel 425.-