Lot 50106 – 1920 20pf dark cobalt with double overprint in mint n.h. top left corner marginal block of 30

1920 20pf dark cobalt with « SARRE » overprint (type I) doubly printed, in mint top left corner marginal block of 30, three stamps with some paper adhesion on reverse, very fine and spectacular multiple, the largest multiple surviving according to the cert. Axel Braun (2012) (Mi. €1’200 for mint n.h. single).