Ready to test instruments for use in the attempt on the word's height record in 1935 (c1937). American balloonists Orvil Arson Anderson (1895-1965) and Albert William Stevens (1886-1949) won the Mackay Trophy when they set a record of 72,395 feet in their balloon Explorer II in 1935. From Wonders of World Aviation, Vol. 1, by Clarence Winchester. [The Amalgamated Press Ltd, London, c1937]
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