{"version":"1.0","type":"photo","width":1024,"height":573,"title":"airmail flight cover: Boeing 307 Stratoliner, first pressure-cabin test flight","url":"https:\/\/static.sfomuseum.org\/media\/152\/783\/470\/5\/1527834705_I5jE2dqs8FcB6edxQcfDKP10XQF5lRWv_b.jpg","author_name":"SFO Museum","author_url":"https:\/\/collection.sfomuseum.org\/objects\/1511953429\/","provider_name":"SFO Museum","provider_url":"https:\/\/collection.sfomuseum.org\/"}