Los-Nr. 422

1921, Amundsen and Maud Expedition trial flight, cover with two vignettes in red and violet with the corresponding stamps attached to it, with adjacent straight line "MAUDEXPEDITIONEN" and the green five line cachet "DATE/LATD/LONG/TEMP", signed by Amundsen, Hubert Work, the Postmaster General, and by Warren G. Harding, the President of the United States of America, fine