Here is a 3.35 pesos rate cover to Massachusetts, US, postmarked BUENOS AIRES A.P. 6, and bearing singles of the 15c Small Cow Dark Blue, 20c Martin Guemes Light Blue, the 1 Pesos no boundaries, and 2 Pesos. The cover is dated August 18, 1938. Quick links: Complete Listing / 2P Continental Grain / 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