Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 95:
1934, inverted black overprint ”11 Nov. 1934 – XIII. Servizio Aerea Speciale” on Colonial Arts Exposition air post stamp of 25c blue and brownish orange, nicely centered and very fresh, full OG, NH, VF and rare, several expert’s signs on reverse, S. Cilio certificate, Sassone #A2b, C.v. €12,000 as NH, Est. $1,500-$2,000, Sc. #CO1 var
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