Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1

Worldwide Air Post Stamps and Postal History - Switzerland

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Start price: $200

Buyer's premium:

1913 (April 6), Start Aarau, 50c blue, yellow and magenta, used on color official PPC No.2 from Aarau to Olten, in addition unused single stamp with OG, previously hinged, both are VF, SBK #I, CHF1,200, Est. $300-$400