Registered cover sent from icebreaker ARA Irizar on 1/DE/96, carried by helicopter in Argentine Antarctica, sent to B.Aires, franked with pair of GJ.2711 + 2725, on back mark of the ship, VF
Cover sent from Petrel Antarctic station to Buenos Aires on 4/AU/1975, with arrival backstamp of 3/MAR/1976, on front it bears a handstamp of the station + "DECLARACIÓN CONJUNTA" cancel, very nice!
Antarctic Campaign 1967/68: 5 covers cacheted "Grupo Naval de Tareas Antárticas" with postmarks of Antartic stations: Petrel, Belgrano, Brown, Esperanza and Orcadas, very nice!