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: $250

Buyer's premium:

1913, Laufen, 50c green, ”Laufen – Solothurn. 28.9.13” air post marking, stamp with full OG, mostly VF, SBK #VII, CHF2,600, Est. $400-$500