Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 956:
1921, black surcharge 10c on 10c dark red, horizontal pair, right stamp without surcharge, full OG, NH, VF, expertized by E. Diena, C.v. $775 as hinged, Sassone #3aa, C.v. €4,000, Est. $500-$600 , Sc. #3a
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