Cover with handstamp of First Helicopter flight of the Argentine Air Force in Antarctica of 26/NO/1968 (Image)

Cover with handstamp of LADE special flight Comodoro Rivadavia - Puerto Stanley of 15/NO/1972, on back "Joint Declaration" marks in Spanish and English, VF (Image)

$11 Aerogram uprated with $11, sent from the scientific Antarctic station "Alte. Brown" to Buenos Aires on 17/FE/1975, with postmark of "6° Crucero Turístico", very nice! (Image)

Cover franked with $15.30 (GJ.1680 + other values), sent from the Antarctic Base Alte. Brown to Buenos Aires on 11/DE/1976, with large handstamp of the 'Dirección Nacional del Antártico' on front, and arrival backstamp, VF quality! (Image)

3 Covers with postmarks of different Antarctic stations, corresponding to the 1985/86 campaign (Image)