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 Arizona Fredonia 1928 violet 4c-bar 2c Harding Memorial Imperforate. Philatelic. Coconino county. AZ280827 $10.00
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 California Harbison Canyon 1928 4c-bar 1927-1936 2c Harding Memorial Imperforate Philatelic. San Diego county. CA280815 $15.00
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 District of Columbia Washington, D.C. International Aeronautics Conference Dec 12-14, 1928 1928 green International Machine 2c and 5c Civil Aeronautics Air Mail Philatelic.
DC281213 $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 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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 Hawaii Honolulu 1928 machine 2c Hawaii. Oahu county. HI280815 $10.00
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 Massachusetts Springfield 1928 machine 2c Hawaii. Hampden county. MA281013 $10.00
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 Missouri Fairview 1928 violet 4c-bar 2c White Plains. Newton county. MO280801 $10.00
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 New Jersey West New York 1928 machine 2c Molly Pitcher. Hudson county. NJ281126 $10.00
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 New Jersey Passaic 1928 machine 2c Molly Pitcher. Passaic county. NJ281212-CJG $10.00
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 Pennsylvania Clearfield 1928 machine 2c Lexington Concord. Clearfield county. PA280425 $10.00
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 U.S. R.P.O.'s Wash. & Bristol 1928 302-M-3 2c White Plains.
RP280127 $10.00
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 Alaska Juneau 1929 numeral duplex� Type 22� 2c Sullivan� Bit redcued at left.
AK290914 $10.00
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 Arkansas Gifford 1929 4c-bar� 1874-1929� 2c Sullivan� Philatelic� Small tear at right and small stains at top left.�. Hot Spring county. AR290814A� $15.00
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 California Pasadena 1929 machine 5c Ericsson Airmail Label Not Tied Welcome National Convention Elks July 1929 Los Angeles. Los Angeles county. CA290630A $15.00
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