Valerie is a 1957 Western starring Anita Ekberg, Anthony Steele and Sterling Hayden. Not your typical Western, it's Rashoman-in-the-West more than anything else. The actors are pretty, but I've seen Rashoman and am not especially impressed by this take on the idea.
... and can that possibly be a theremin I hear in the score? In a Western? I must be mistaken, but I swear that's what it sounds like.
It doesn't help my enjoyment of the film that, as I watch it, I keep hearing in my head (get it? Head?) The Monkees' priceless 1968 Valeri, which holds such fond memories for me:
DVD Talk seems to have trouble looking past Ekberg's attractions but does call the film "thematically-interesting". TCM has an overview.