4 Pfg with plate flaws IV "THÜRINGFN" as well V and VI in the block of four from the corner with normal stamp, in perfect condition mint never hinged, unsigned, photo expertize Herpichböhm BPP "it is the from specialists sought-after plate flaw [. . . ] in the LU corner margin foursome souvenir sheet. Of the plate. F. Is rare and there are it only in partial editions the special -classes "Xt" and "Xv". Experts to estimate the edition on 200 to at most 300 examples. [. . . ] the block of four is in perfect condition with original gumming. The stamps are well centered and perforated. ", Michel 500.-