20 Pfg violet ultramarine steep overprint vertical strip of four with gutter at bottom margin as multiple franking on registered letter to Prieborn, single circle K. D. fieldpost station office 10 I 4 No. 8 ( = Shanghaikuan), arrival postmark ZKr PRIEBORN 21.5, 01 7-8 N * * * at back, franking rarity, the cover point at recognizable signs of transportation on, the stamps even are intact