This cover is most likely a 4.25 Pesos cover with a missing 25 centavos stamp. and a pair of 2 Pesos stamps. The cover is postmarked E.R.V.1o BUENOS AIRES, and dated August 22, 1944. On the back, there are several New York receipt marks from August 29 and August 30, 1944.(CGcov012) Quick links: main page / 5c and 10c / 20cLC, 25c, and 30c / 40c and 50c / Airmail Stamps / 1 Peso / 2 Pesos / 5 Pesos / 10 Pesos