Duffy (1968)

Directed by Robert Parrish
James Coburn
James Mason
James Fox
Susannah York

IMDb: "Duffy is a cunning aristocrat of criminals who is hired by Stefane, a young playboy, to hijack a boat carrying several million dollars of his father's fortune. The plot succeeds, with a little help from Segolene, Stefane's girlfriend - but also with an unexpected, sudden turn of events. "