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Our online database features over 10,000 objects from our collection, including over 200 airmail covers from all over the world, commemorating different airmail routes. See them here: http://bit.ly/AirMailSFO Pan American Airways airmail flight cover, Eastbound from Manila 1936 SFO Museum Collection Gift of Jon E. Krupnick 2008.075.155 This image was posted on April 24, 2016.