Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Worldwide Air Post Stamps and Postal History - Ecuador

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Start price: $150

Buyer's premium:

1929, red surcharge with ”Provisional” at 41 degree angle 50c on Colombia Air Post 10c green, horizontal pair, full OG, NH, VF, C.v. $250 as hinged singles, Scott #C1a