@SFOMuseum Twitter Posts This is SFO Museum's archive of the @SFOMuseum Twitter account.
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Airmail became a driving force in the development of commercial aviation after WWI. Airmail envelopes and letters were instant souvenirs of new routes and first flights. Flight covers serve as tangible proof of major aeronautical achievements. #AirmailDownUnder . This tweet was posted on October 12, 2022.