When seeking out the value of a poster, it is important first of all to determine its actual authenticity and whether the release date makes it an original or re-release item. Paper size, texture and copyright info usually determine age of most film posters. Many of the earlier vintage posters produced before 1940 had studio logos and copyrights but were often not dated. After 1940, National Screen Service distributed most U.S. film posters and these were dated and coded at the bottom of the poster. In the 1960's and 1970's several companies, the most prominent being Portal Publications, reproduced a number of vintage movie posters. Several aspects of these posters make it easy to identify them as reproductions. First, their size --- 24" x 36" --- a size not produced by any movie studio for display in theaters. The standard "one sheet" size movie poster was always 27" x 41". Second, at the bottom of the poster was clearly printed "copyright Portal Publications". It had the original release date of the film, but it still is not an original. These posters were printed on a flat stock, which does make them appear in this day and age --- "old", but they are not original and are virtually worthless. Re-release or reissue posters are still "original" theater used movie posters, but have considerably lesser value than a first release poster. Most often you can determine a reissue by looking at the bottom of your poster in the right hand corner. There will usually be an "R" in front of a year number --- as in "R56" --- if it is a reissue. Other clues are phrases such as "An Encore Hit", "Brought Back by Popular Demand" or "Nothing Cut But the Prices". Newer posters from the 1990's on, produced on glossy stock, have been "bootlegged" in the thousands, so it is very difficult to determine authenticity.