souvenir sheet issue "for Berlin monetary reform vitims" with plate flaw the 30 pfennigs stamp "additional vertical hatching stroke in patera over small finger", on properly franked registered mail with special cancel "Berlin Charlottenburg foundation the regional Directorate of Post 26.1.50) to Stuttgart, reverse arrival postmark STUTTGART 29.1.50, small tear in the envelope left, otherwise sound, photo expertize Hans Georg Schlegel BPP (1997) "defects are indistinguishable", Michel 4000.- plus plus