Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 852:
1920, three stamps bearing black or violet framed and black unframed overprints together with black monogram surcharge 3r on perforated 3k red, all with full OG, NH or VLH (1), VF and rare group, especially stamp with framed violet overprint, not listed in Scott and Artar, ex-Zakhary Umikov, Est. $250-$300
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