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[[ commemorative envelope - postage stamp has apparently been removed]] [[preprinted]] [[image - banner reading "FORTIETH ANNIVERSARY 1912 - APRIL 21 - 1952"]] FIRST AEROPLANE FLIGHT ON THE ISTHMUS CLARENCE A. deGIERS [[image - two airplanes over outline of Panama with the word "PANAMA" inside the outline]] Sponsored by JACK KNIGHT AIRMAIL SOCIETY THE EARLY BIRDS PAN AMERICAN WORLD AIRWAYS COMMEMORATIVE FLIGHT [[logo - PAA]] PANAMA CITY TO MIAMI [[box]] CORREO AEREO PANAMA-MIAMI AIR MAIL VIA [[logo - PAA]] PAN AMERICAN WORLD AIRWAYS 40o ANIVERSARIO 40th ANNIVERSARY C.A. deGIERS VUELO EN PANAMA PANAMA FLIGHT [[/box]] [[/preprinted]] [[stamp - postmark reading "DESPAGNA EXTERIOR PANAMA APR 21 1952"]] Brig. Gen. T. D. Milling 3700 Massachusetts Avenue N.W. Washington 16, D.C. [[stamp]]CO-SPONSOR STAR and HERALD[[/stamp]] [[stamp]]CO-SPONSOR 1912 [[coat of arms]] 1952 REPUBLICĂ de PANAMĂ[[stamp]] [[stamp]] [[?]]R 26 1964