25 cent. Green overprint on 100 Mark vermilion, horizontal pair from lower margin (field 99+100) the types I and the very rare type II (bulbous numerals), impeccable mint never hinged and still unsigned (small rest of hinge only on the lower margin and this also on face with pencil inscribed), photo expertize Prof. Dr. U. E. Klein BPP (for former block of four) : \"genuine and immaculate. \" very rare! Michel 7.500.-