Knockout Joe(1980)

When Max, the owner of a brick manufacturing company, is given 50 carats worth of diamonds to smuggle out of the country for a fee of R5 million, he is completely unaware he is being set up.With an undercover cop closely keeping surveillance, Max sets out with two comrades and while on route to their destination, the diamonds mysteriously go missing. In the end, Max and his accomplices are arrested by the undercover cop, and it’s revealed that they are the ones that tried to double cross Max by secretly stealing the diamonds for themselves.