unused Block Larger Than four 2n. yellow, an extremely rare block of ten (5x2) with much original gum, perforations heavily reinforced in places, however believed to be the largest existing multiple and of very fine appearance. Photo in colour

细节
unused Block Larger Than four 2n. yellow, an extremely rare block of ten (5x2) with much original gum, perforations heavily reinforced in places, however believed to be the largest existing multiple and of very fine appearance. Photo in colour