National Geographic Society Balloon Explorer II Fabric - 1935

Fabric bookmark with illustration of this record-setting balloon printed on actual balloon fabric stating: "This fabric bookmark is part of the Balloon 'Explorer II' which in the service of science attained the world's altitude record of 79,395 feet above sea level on November 11, 1935" Size is 2.25x6.75"; reverse carries a listing of the balloon's statistics. Very good.