Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2

Armenia

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Start price: $200

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1919, inverted violet framed overprint (small size – 9mm) on 5r dark blue green and pale blue, perforated single, full OG, NH, VF and very rare, only a few stamps recorded, ex-Zakhary Umikov, Est. $300-$400 , Sc. #18 var