8 ++ 7 Pfg reconstruction with blunted experimental perforation on thin paper, block of four with right lower corner of the sheet, centric cancellation "FINSTERWALDE g 31.3.46", faultless condition, very scarce variety, photo expertize Kunz BPP (2018) "the block of four from of the right lower corner of the sheet is genuine and in perfect quality. ", by Michel unknown!