Lot 50254 – 1871 10b ultramarine block of 20 largest multiple showing blank space and variety of position 99 probably a unique multiple;

1871 10b ultramarine, on white wove paper, type II, mint block of twenty, with blank space top right, and position 99 showing the « blob under neck » flaw, original gum, 14 stamps n.h., only one stamp touched top otherwise margins all round, superb showpiece block of twenty; a block of 19 is illustrated in the Heimbüchler handbook on page 30; according to our records, this is the largest known multiple showing the blank space and the variety of position 99, probably unique.