The first black and white film composed for widescreen was MGM's CREST OF THE WAVE which rolled on May 4, 1953 and was composed for 1.75:1.
The first VistaVision film in black and white was THE DESPERATE HOURS which began production on October 19, 1954. When reviewed in September 1955, the recommended aspect ratio was 2:1.
REBEL WITHOUT A CAUSE began filming in black and white CinemaScope on March 30, 1955 but switched to Warnercolor on April 4.
On April 11, 1955, Zanuck insisted that CinemaScope productions must be in color.
On April 9, 1956, MGM began filming THE POWER AND THE PRIZE in black and white 2.35:1 CinemaScope. It was released on September 26, 1956.
The first Fox CinemaScope film in black and white was TEENAGE REBEL. Originally planned for color, the plans were dropped when filming began on June 21, 1956.