1950-12: Famous Argentinians - Wmk straight rays sun RA

1950-10: Famous Argentinians - Wmk round sun RA

1950-09: Country Products

1950-08-26: International Philatelic Exhibition "E.F.I.R.A, Buenos Aire

1950-08-17: Death Centenary of General José Francisco de San Martíin

1950-08-17: José Francisco de San Martín (1778-1850), Death Centenary

1950-08-17: José Francisco de San Martín (1778-1850), Death Centenary

1950-04: Famous Argentinians - Typo

1950: Official