15/AP/1931 Puerto Deseado - Buenos Aires, airmail cover franked with 25c., carried by Aeroposta Argentina, arrival backstamp, VF quality! (Image)

Cover sent from Resistencia (Chaco) to Buenos Aires on 19/OC/1945 franked with 5c. to pay for surface mail, but carried by LADE as special service, which applied the mark: "POR AVION - LINEAS AEREAS DEL ESTADO - UTILICE SUS SERVICIOS", with arrival backstamp of 20/OC, interesting! (Image)