Registered cover with typed 'By Airmail' at top franked with 1945 1col black 'Aereo' overprint issue on front and 1938 3c brown and 20c olive brown on reverse (SG 942, 894 & 898) tied by PRIMER DIA DE CIRCULACION cds dated AGO 23 1945 with boxed registration marking alongside and stamps on the reverse tied by airmail roller cancel. Addressed to USA with transit and arrival marks on reverse.