Gina Lollobrigida's salary was $50,000, which she considered to be a comedown. Both she and Lee Van Cleef were apparently troublesome during the shoot.
James Mason was not too impressed with the final result. In an interview he said, "When shooting a western in Spain, one should not say to oneself, 'Never mind, no one is going to see it,' because that will be just the film that the Rank Organisation will choose to release in England!".