Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1372:
1925, the third issue, inverted surcharges 5k on 1k, 10k on 3k and 15k on 1k, all with full OG, mainly LH, VF, Standard #PE6Ta-8Ta, Est. $250-$300
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