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: $300

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1913 (June 8), Lugano, 25c blue green, red on gray background used on specially printed postcard to Milan together with 10c red, Posta Aerea ”8-GIUG-1913. Lugano” postmark along with Mendrisio ”8.VI.13” ds, mostly VF and scarce, SBK #IX, CHF2,800, Est. $500-$600