The history of film trailers began in the early 1900s, with Nils Granlund creating the first promotional trailer for a musical and the first trailer for a Charlie Chaplin film in 1914. Until the 1950s, the National Screen Service contracted with film companies to produce trailers. Early trailers contained clips, narration, and music to promote films. In the 1960s, as films and culture became more liberal, trailers changed in style to advertise different types of new films. Andrew J. Kuehn significantly changed trailer production with his 1964 trailer for "Night of the Iguana" and went on to produce over 1,000 trailers during his career at Kaleidoscope Films. Traditionally, film