Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 163:
1913 (March 30), Herisau, 50c blue, used on specially printed postcard together with 5c green, addressed to Zurich, some card faults, in addition an unused single (no gum), VF appearance, SBK #V, CHF1,500, Est. $250-$300
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