Each of these fighters were Argentinian fighters of note in the 1940's and 1950's.
Martiniano Pereyra - WW(7) - 1954-1960
Adalberto Ochoa - WW(5) - 1950-1960
Jose Maria Gatica - LW(6) - 1945-1956
Alfredo Prada - LW(6) - 1943-1956
Pereyra_Martiniano.tbdx3
Ochoa_Adalberto.tbdx3
Gatica_JoseMaria.tbdx3
Prada_Alfredo.tbdx3
Photos of Pereyra and Ochoa are in the 1950-1959 thread in the Photo sub-forum; Gatica and Prada are in the 1940-1949 thread.