Pan American Airways service to Central America, 1951

Supplementary material reads: "Pan American Airways photo: Postmaster Michael D. Fanning (R) stamps the first flight cachet honoring the inauguration of Pan American World Airways' direct service (beginning December 3) to Guatemala, while Juan Matute, station traffic manager of the airline, looks on. Constellation Clippers of PAA will save one day in airmail deliveries to Central and South America from the Pacific Coast on the new run, which also closes the last link in roundworld service over a single U.S. air transport system".

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