Auction #93 Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World

1892, 2k deep blue, bottom right corner sheet margin block of nine, three stamps at bottom placed sideways, forming three couche pairs, minor marginal wrinkles did not affect the stamps, full OG, NH,VF and scarce multiple, Chuchin #8, a, C.v. $642 as hinged, Est. $500-$600