Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 605:
1920, registered cover from Batum to Bern, franked by black surcharges on Tree stamps – 25r on 5k green and 50r (cut ”50”) on 50k yellow, printed registered label and arrival marking is alongside, mostly VF, Est. $250-$300 , Sc. #51, 55a
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