Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 66:
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 hs on reverse, S. Cilio certificate, Sassone #A2b, C.v. €12,000 as NH, Est. $1,800-$2,000, Scott #CO1 var
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