The opening fare for AMC's Six West was "Candy", starring Marlon Brando and Richard Burton (on screens 1 through 4) and "Shalako", featuring Sean Connery and Brigitte Bardot (on screens 5 and 6).
Poster 1 from Wikipedia / www.movieposter.com
Poster 2 from Wikipedia / http://www.britposters.com/images/shalako%20chantrell%20320x240