One of the most interesting yet lesser-known motion picture collectible is the Exhibitor Book, Pressbook or Presskit. As exemplified by the Blade Runner Presskit above, containing 18 supplements (78 pp. in all, stapled together), 21 photos, which vary from 6 ¼ x 10” (16 x 26 cm.) to 7 ¾ x 10” (20 x 26 cm.), and the original printed studio envelope in which the presskit was mailed, its purpose was to help promote the film.