$11 Aerogram uprated with $17, sent from Marambio station to Buenos Aires on 14/SE/1972, with cancels of "Puente Aéreo con Aviones C-130" and "Operación Marambio V", very nice!
Cover with cachet of the 1980/81 Antarctic Campaign - A.R.A Bahía Aguirre (along cinderella of the ship), with postmarks of Antarctic stations: Alte. Brown, Jubany, Esperanza, Primavera and Orcadas, light staining