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3. US Airmail

Scott# C11 “BEACON on a 1928 YALE AERONAUTICAL SOCIETY CONFERENCE COVER

$14.95
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Scott# C11 “BEACON on the ROCKY MOUNTAINS” AIRMAIL SINGLE, MINT

$1.99
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Scott# C11 “BEACON on the ROCKY MOUNTAINS” AIRMAIL SINGLE, MNH

$7.95
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3. US Airmail

Scott# C11 “BEACON on the ROCKY MOUNTAINS” FIRST FLIGHT – FAM 8 TEXAS – MEXICO CITY

$14.95
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Scott# C11 “BEACON on the ROCKY MOUNTAINS” HIGH & LOW PLANES, MNH

$19.95
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Scott# C11 “BEACON on the ROCKY MOUNTAINS” TOP PLATE BLOCK (6)MNH

$39.95
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3. US Airmail

Scott# C113 “ALFRED VERVILLE-INVENTOR” PLATE BLOCK (4)MNH

$3.75
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Scott# C113 “ALFRED VERVILLE-INVENTOR” SINGLE, MNH

$0.85
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3. US Airmail

Scott# C114 “LAWRENCE & ERNEST SPERRY – DESIGNERS” SINGLE, MNH

$1.35
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3. US Airmail

Scott# C114 “LAWRENCE & ERNEST SPERRY” PLATE BLOCK (4) MNH

$3.75
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3. US Airmail

Scott# C114 “LAWRENCE & ERNEST SPERRY” ZIP BLOCK (4) MNH

$3.95
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3. US Airmail

Scott# C115 “TRANSPACIFIC AIRMAIL” MNH PLATE BLOCK (4)

$4.25