The Upper Hand (1966)

Paul Berger, an ageing criminal and nightclub owner, pulls the strings behind an international gold smuggling ring. With the help of well-connected Walter, his right-hand man, Paul recruits men with no criminal record to do the dirty work under the nose of the police. However, the mob is onto them, wanting a piece of the action, and as if that weren't enough, there's a snitch in their midst: an undercover US Treasury Department agent. When a partner meets his brutal end, Paulo decides to take matters into his own hands. Now, the guns have the final say.