Cover with manuscript 'Correo Aereo' at top franked with 1930 pair 1s deep brown 'Portrait' issue and 1931 15c light blue and 20c orange yellow 'Litho' issue (SG 489 & 503/504) tied by LIMA 3 cds dated 16 DIC 1931 with printed registration label alongside. Addressed to UK with various transit & arrival marks on reverse.