Gregorio Walerstein Weinstock ( 22 February 1913 &ndash; 24 January 2002 ) was a Mexican film producer and screenwriter of Jewish descent . He produced 193 films between 1941 and 1989 . His productions include '' Ash Wednesday '' ( 1958 ) , which was entered into the 8th Berlin International Film Festival , and '' La Valentina '' ( 1966 ) , his last collaboration with actress María Félix . He also discovered actresses Flor Silvestre , Ofelia Montesco , and Hilda Aguirre
8th Berlin International Film Festival
8th Berlin International Film Festival
Gregorio Walerstein