MAJOR GENERAL JOSEPH O. MAUBORGNE - AUTOGRAPHED SIGNED CHECK 05/03/1918 - HFSID 317460
GENERAL JOSEPH O. MAUBORGNE World War I-dated check for $91.93. Check signed: "J. O. Mauborgne", 7¾x2¾. Washington, D.C., 1918 May 3. Check #100, drawn on the Riggs National Bank, payable to "Helen Gruman" for $91.93. Entirely filled out by Mauborgne. Endorsed on verso "Helen Gruman".
Sale Price $187.00
Reg. $220.00
GENERAL JOSEPH O. MAUBORGNE
World War I-dated check for $91.93.
Check signed: "J. O. Mauborgne", 7¾x2¾. Washington, D.C., 1918 May 3. Check #100, drawn on the Riggs National Bank, payable to "Helen Gruman" for $91.93. Entirely filled out by Mauborgne. Endorsed on verso "Helen Gruman". Joseph Oswald Mauborgne (1881-1971) joined the US Army in 1903, and attended the Army Signal School at Fort Leavenworth (1909-1910). In 1912, Mauborgne installed the first radio on an airplane, with which future Air Force commander Henry "Hap" Arnold sent the first radio message from the air to Mauborgne on the ground. Two years later, Mauborgne, this time aloft, conducted the first two-way radio communication with a ground station (December 16, 1914). That same year, he found a solution to the Playfair cypher (a substitution cypher using a pair of letters, not just one). In 1919, Mauborgne and Gilbert Vernon of Bell Laboratories invented the one-time pad, a code technique which still cannot be broken if used properly. As Chief of Signal (1939-1941), Mauborgne pressed the first mass production of radar. He retired on September 30, 1941, less than 6 weeks before Pearl Harbor. He is enshrined in the Military Intelligence Hall of Fame. Perforation marks. Vertical crease from fold. Lightly toned. Small tear at bottom left edge. Otherwise, fine condition.
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