{"version":"1.0","type":"photo","width":1023,"height":573,"title":"airmail flight cover: Boeing 307 Stratoliner, first pressure-cabin test flight","url":"https:\/\/static.sfomuseum.org\/media\/152\/783\/472\/7\/1527834727_VxX7H53at93pgBe8SkN5p1bpPv8ZV1Bh_b.jpg","author_name":"SFO Museum","author_url":"https:\/\/collection.sfomuseum.org\/objects\/1511953435\/","provider_name":"SFO Museum","provider_url":"https:\/\/collection.sfomuseum.org\/"}