 One of only two films shot in the MGM Camera 65 cinematographic  process (the other being _Raintree County (1957)_ (qv), which was  only released in 35mm prints). The MGM Camera 65 process used 65mm  negative stock, but the 70mm prints intended for projection  contained additional space for a stereophonic track that was printed  in magnetic stripes directly on the film in the sprocket