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 Iowa Altoona 1928 4a-bar 5c Roosevelt and 10c Monroe Fourth Bureau on 2c Sesquicentennial Envelope Registered. Polk county. IA280703 $10.00
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 Iowa Chelsea 1928 4c-bar Postal Stationery Envelope. Tama county. IA280709 $10.00
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 Iowa Mystic 1928 duplex PC. Appanoose county. IA280714 $10.00
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 Iowa Burlington 1928 numeral duplex 2c Washington Fourth Bureau and 10c Motorcycle Messenger Special Delivery. Des Moines county. IA280804 $10.00
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 Iowa Fairfield 1928 numeral duplex 2c Washington and 10c Monroe Fourth Bureau Special Delivery. Jefferson county. IA281130 $10.00
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 Iowa Homestead 1928 Show Your Return Address in 4-bar PC. Iowa county. IA281221 $10.00
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 Iowa Benton c1928 4a-bar PC. Ringgold county. IA281221A $10.00
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 Iowa Boxholm c1928 4b-bar PC. Boone county. IA281222 $10.00
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 Iowa Manchester 1929 numeral duplex 10c Motorcycle Messenger Special Delivery on 2c Washington Circular Die Envelope Rough at right and resealed with selvedge. Delaware county. IA290126 $10.00
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 Iowa Burlington 1929 machine 2c Washington Fourth Bureau PPC to Germany. Des Moines county. IA290128 $10.00
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 Iowa Humeston, Iowa 1929 Ielfield Machine Type A2 Postal Stationery Envelope Small opening tear at top right. Wayne county. IA290201 $10.00
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 Iowa Leeds Sta. Sioux City 1929 numeral duplex DPO 2c George Rogers Clark. Woodbury county. IA290402 $10.00
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 Iowa Ames Registered 1929 violet double ring 15c Statue of Liberty Fourth Bureau on 2c Washington Circular Die Envelope. Story county. IA290419 $10.00
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 Iowa Davenport Registered 1929 violet double ring 1c Franklin, 2c Washington and 15c Statue of Liberty Fourth Bureau on 2c Washington Circular Die Envelope. Scott county. IA290628 $10.00
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 Iowa Fayette 1929 numeral duplex Illustrated Corner card James Richards Chrysler and Whippet Cars. Fayette county. IA291023 $10.00
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 Iowa Clinton 1929 numeral duplex 10c Motorcycle Messenger Special Delivery on 2c Washington Circular Die Envelope. Clinton county. IA291214 $10.00
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 Iowa Locust 1929 4c-bar 1883-1936 PC. Winneshiek county. IA291223 $20.00
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 Iowa Solon 1929 4c-bar PC. Johnson county. IA291223A $10.00
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 Iowa Chapin 1930 4c-bar PC. Franklin county. IA300101 $10.00
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 Iowa Atalissa c1930 4c-bar PC. Muscatine county. IA300120 $10.00
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 Iowa Spirit Lake 1930 machine 2c Washington Circular Die Envelope to Canal Zone. Dickinson county. IA300217 $20.00
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 Iowa Cedar Rapids 1930 numeral duplex 10c Motorcycle Messenger Special Delivery on 2c Washington Circular Die Envelope. Linn county. IA300320 $10.00
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 Iowa Decorah 1930 numeral duplex 2c Washington Fourth Bureau and 10c Motorcycle Messenger Special Delivery Reduced at bottom and at left. Winneshiek county. IA300410 $10.00
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 Iowa Roscoe 1930 cds, cork killer 1877-1939 Philatelic. Des Moines county. IA300425 $10.00
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 Iowa Iowa Falls 1930 machine Obverse and Reverse Illustrated Advertising Hotel Arling Small pinhole at top. Hardin county. IA300509 $10.00
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 Iowa Homestead 1930 Show Your Return Address On All Mail in 4-bar Philatelic. Iowa county. IA300522 $10.00
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 Iowa Shueyville 1930 4b-bar 1856-1934 Postal Card. Johnson county. IA300729 $10.00
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 Iowa Protivin 1930 violet 4a-bar. Howard county. IA300804 $10.00
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 Iowa Orange City 1930 duplex 1c Franklin and 2c Washington Fourth Bureau on 2c Washington Circular Die Envelope to The Netherlands Corner card Cambier Motor Company Edge wear and creases. Sioux county. IA301218 $15.00
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 Iowa Davenport Registered 1931 violet double ring 3c Lincoln, 2c Washington coil and 15c Statue of Liberty Fourth Bureau Elaborate Corner card First National Bank in the United States. Scott county. IA310221 $10.00
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 Iowa Homestead Show Your Return Address on All Mail 1931 non standard 4-bar Philatelic. Iowa county. IA310317 $10.00
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 Iowa Washington 1931 machine 5c Roosevelt Fourth Bureau to Germany Crease. Washington county. IA310331 $10.00
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 Iowa Watkins 1931 4c-bar PC. Benton county. IA310331A $10.00
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 Iowa Davenport 1931 machine Postal Card Reverse Illustrated Advertising The Berkell Players Star Theater Contemporary doodles on face. Scott county. IA310403 $15.00
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 Iowa Lincoln 1931 4e-bar Postal Stationery Envelope Corner card Farmers Co-Op Elev. Co. Tama county. IA310504 $10.00
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 Iowa Dow City 1931 4c-bar PC Some edge wear. Crawford county. IA310516 $10.00
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 Iowa Chapin 1930 4c-bar PC Small tear at right. Franklin county. IA310622 $10.00
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 Iowa Davenport Registered 1931 violet double ring 3c Lincoln and 15c Statue of Liberty Fourth Bureau on 2c Washington Fourth Bureau Corner card Union Savings Bank. Scott county. IA310626 $10.00
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 Iowa Burlington 1931 machine Illustrated Advertising Hotel Lakeland. Des Moines county. IA310723 $10.00
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 Iowa Durango 1931 4c-bar 1850-1983. Dubuque county. IA310723A $10.00
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