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: $100

Buyer's premium:

1913, Laufen, 50c green, nice and fresh single, full OG, LH, VF, SBK #VII, CHF550, Est. $150-$200