In the end of the movie, when Martin is in Spain, a 2003 Nissan Almera passes in the foreground although the movie is supposed to take place in the 1970s.
In a scene on the pier you can see Martin drinking a "Zingo" with an a way to old label. In the year 1975 it should be quite undrinkable because it's an about ten years old bottle.
When Martin is in the car with the bad guys and been offered a cigarette, a package "John Silver" appears. There have been a number of changes since 1975 and that one in the scene is from around year 2000.