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1920's Commemoratives 5c Aeronautic Conference with 3c Washington-Franklin 1930 Boston, Mass. (Philatelic Exhibition Sta.) Double weight to Shanghai, China. Stain. Suffolk county. QG300812 $25.00
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Missouri St. Louis, Mo. 1 1918 International Machine Type D42 Third National Aero Congress St. Louis, Mo Oct. 1-2-3 2c Harding Memorial Corner card A.P. Richter Ice and Fuel Co. Saint Louis City county. MO231003A $15.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 2c and 5c Aeronautical Conference Roessler Airmail Envelope Philatelic.
DC281213A $15.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 2c and 5c Aeronautical Conference Airmail Philatelic.
DC281213B $15.00
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District of Columbia Washington 11, D.C. 1928 green International Machine Type International Civil Aeronautics Conference 5c Aeronautical Conference Airmail Philatelic.
DC281213C $10.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 5c Aeronautical Conference Airmail Philatelic.
DC281213D $10.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 5c Aeronautical Conference Airmail Philatelic.
DC281213E $10.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 5c Aeronautical Conference Airmail Philatelic.
DC281213F $10.00
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District of Columbia Washington, D.C. 11 1928 green International Machine Type Internatnional Civil Aeronautics Conference Dec. 12-14, 1928 2c Aeronautical Conference Philatelic.
DC281214A $10.00
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District of Columbia Washington 11, D.C. 1928 green International Machine Type International Civil Aeronautics Conference 2c Aeronautical Conference Philatelic.
DC281214C $15.00
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Colorado Pueblo, Colo. Registered 1929 violet double ring with star L-DW 950 2c Vincennes and 5c Aeronautical Conference Plate Number 19658 (3). Pueblo county. CO290304 $20.00
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Idaho Pocatello 1929 machine 5c Aeronautical Confererence Airmail. Bannock county. ID290501 $10.00
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Minnesota Redwood Falls 1925 machine 5c Aeronautical Conference Airmail Corner card Hotel Redwood. Redwood county. MN290205 $10.00
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New Jersey Elizabeth 1929 machine 2c Aeronautical Conference Violet and black Illustrated Corner card Sunbeam Appliance Co. Union county. NJ290108 $10.00
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California Yosemite Natl. Park 1930 machine 5c Aeronautics Conference Airmail No back flap. Mariposa county. CA300629 $10.00
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Florida Miami 1930 numeral duplex 1c Franklin Fourth Bureau and 2c Aeronautical Conference (2) Airmail. Dade county. FL300212 $10.00
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Illinois Chicago Air Mail 1930 duplex 5c Aeronautical Conference Airmail. Cook county. IL300827 $15.00
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Massachusetts Southboro, Mass. 1930 Columbia Machine Type G2W 1892-1971 2c Aeronautical Conference Small crease at left. Worcester county. MA300414 $10.00
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New York Richmond Hill 1931 machine 5c Aeronautical Conference to Germany. Queens county. NY310326 $10.00
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