Lucélia Santos and Rubens de Falco, stars of "Escrava Isaura" series from 1976. On IMDB HERE. There is some mistake: in Poland aried in 1984-85. On Wikipedia HERE. Has 100 episodes. I found these postcards in my collection deep in one of the boxes.
"It was the most popular program in the history of Polish television and at the same time first telenovela (Latin American soap opera) screened in Poland (1986). On average it was watched by more than 81 percent of the total viewing audience (sometimes as much as 92 percent)."
In episode 2 Leoncio meets Isaura