Here is a 3.15 pesos rate cover to New York, US, postmarked BUENOS AIRES ..., and bearing singles of the 15c Small Cow Light Blue, the 1 Peso without boundaries, and the 2 Pesos. The cover is dated in March of 1941. It bears a very early censorship marking: a small postmark-like "PASSED U.S. CENSOR." Quick links: Complete Listing / 1937 to England / 1938 to Germany ( 1 2 ) / 1938 to US / 1939 to France / 1939 to Germany / 1941 to US ( 1 2 3 ) / 1943 to England / 1944 to US / 1945 to Switzerland / 1947 to US / 1951: Belgium Denmark England / 1952: Ecuador Germany US / 1954 to US / 1956 to Germany / 1957 to US