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PAN AMERICAN WORLD AIRWAYS SYSTEM CHRYSLER BUILDING, 135 EAST 42ND STREET, NEW YORK 17, N.Y. OFFICE OF THE PRESIDENT [[underline]] $ Per [[/underline]] December 8, 1955 Mr. E.R. Silliman, General Manager Compania Mexicana de Aviacion, S.A. Balderas 36 Mexico City, Mexico Dear Tubby: I am glad to send you herewith Pan American World Airways System Flight Annual No. 67 issued in your favor for the year 1956. Will you please sign the receipt at your convenience and have your secretary return it so that our records may be complete. With best regards, Sincerely, Juan [[signature]]