Lot 51763 – 1974 Rock Engravings 5c with error black omitted in mint n.h. lower right corner marginal pair

1974 Rock Engravings 5c with error black omitted in mint n.h. lower right corner marginal pair, surface thin in the margin and adhesion on the other side clear of the stamps from being stuck to another sheet which could well have been the cause of this variety, very fine and very rare, among the most valuable stamps of SWA (SACC R220’000+).