Printed 'Ministerio de Aeronautica, Mision Americana de Aviacion Lima Peru' cover with 'Ministerio de Aeronautica' crossed out and 'Maj Gen Ross E Rowell Embajada de los EE UU' added in manuscript franked with 1938 pair 20c bright purple and 1945 5c chocolate and 1s maroon (SG 644, 699 & 703) tied by three strikes of undated SUCURSAL STA BEATRIZ LIMA cancel in black with printed red & white 'Servicio Aereo' registration label. Addressed to USA with various transit & arrival marks on reverse.