Greetings from 1939 Grand Rapids Airport.
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1966 Mackinac Island Michigan Airport Postcard by Hiawatha Card Co.
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#MackinacIsland #MichiganAviation #VintagePostcard #avgeek #Aviation #AviationHistory #LakeHuron #MackinacBridge #IslandAirport #TravelEphemera #RetroAviation #travel #oldpostcards #GreatLakesTravel