20 Pfennig Prussian blue on paper with steeply sloping paper perforation viewed from the front (paper type p2) in three examples as a valid mixed franking with 30 Pfennig olive gray on paper type p1 and 8 Pfennig red-orange on registered mail from "Erfurt 1 -ah- 23. 3. 46" to Kiel, some yellowish spots, photo certificate Dirk Schulz BPP "20 Pfennig stamps with this paper type (p2) on official letters are rare.", Michel 3. 640.- + +