Although the story in set between 1957 and 1961, there are mostly cars from the mid-1960s. At one point, the protagonists Carlos and Luciana go to movies and we see the poster of John Frankenheimer's "Seven Days in May", which was released in 1964.
At about 40 minutes in, there's a scene with a television in the background and a few people watching it. We hear the theme song from the US television series BEWITCHED, which aired from 1964 to 1972 -- after the timeframe of this film. Also, what's shown on the TV doesn't match the opening credits of the TV series.