Cover with manuscript 'Correo Aereo' at top franked with 1928 15c green and 20c blue 'LAN' airmail issue and 1928 15c carmine 'Map' issue (SG 217/218 & 223) all tied by VALLEGRANDE cds's dated 6 SEP 1929. Addressed to LA PAZ with arrival cds on reverse. An uncommon early internal airmail cover.