Filmed in 1961, not released until 1962.
Most extant versions of this film on disc and streaming use an 'open matte' full frame print, in 4:3 aspect ratio. For theatrical exhibition, this frame was matted to 1.85:1 aspect ratio, but because an open matte print was utilized for later video editions, boom microphones (and excessive headroom above the actors) are visible throughout the film that were never intended to be seen, and are thus not a production error as is often thought.