Rare Weigand & Liard Trans-Pacific Flight cover US to China San Francisco to Hong Kong 1937 believe to be only 4 sets with the Weigand Air Mail boxes right side

$50.00
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Product Code: k364
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Rare Weigand & Liard Trans-Pacific Flight cover US to China San Francisco to Hong Kong 1937 believe to be only 4 sets with the Weigand Air Mail boxes right side