Puerto Rico Aerovias Nacionales semi-official airmail local labels from 1938-1940. Includes complete mint set of Sanabria S1-15 plus an extra set of S1-7 mounted on quadrille pages. Not often seen complete on the philatelic market. Go for it. (Image)

Two Puerto Rico Aerovias Nacionales semi-official airmail covers. One cancelled on September 27, 1938 from St. Croix, Virgin Islands to New York City and the other cancelled on October 31, 1938 from Ponce to San Juan. Mailed to Liverpool, England. (Image)

Puerto Rico Aerovias Nacionales semi-official airmail cover. Mailed with 40 and 75 cents values of the first issue having first day cancel of April 28, 1938. Flown Guanica to San Juan where a US postage was added for its journey by Pan Am to Miami and then New York City. (Image)

Puerto Rico Aerovias Nacionales large semi-official airmail cover. Full set of second issue S8-15 cancelled on first day of March 22, 1941. Mayaguez cancel, flown to San Juan and sent by Pan Am to Brooklyn, New York. (Image)

Puerto Rico Aerovias Nacionales large cacheted semi-official airmail cover. Cancelled on March 22, 1941 in San Juan and Ponce on March 23. Contains complete set of the second issue S8-15. (Image)