1951, Posthorn 4 Pfennig - 20 Pfennig, complete set of the 19 different se-tenants W1 - S12, mint never hinged, flawless condition, partly expertised by Schlegel BPP and for Michel number S8 photo certificate Hans-Dieter Schlegel BPP "The quality is impeccable.", Michel 3. 800.- - complete sets are rarely offered!