Many people are confused by the difference between a reissue and a reproduction of a poster. Many movies were released subsequent to their original dates. For instance, The Wizard of Oz was originally released in 1939, but it was re-released in ’49, ’51, ’55, etc. The studio produced ad campaigns for all of these releases. All of the posters (lobby cards, etc.) are designated as “re-issues”. Oftentimes, the artwork is completely different, but interesting and valuable in its own right. A reproduction, however, is simply a photographic copy of an original poster and has little or no value as a collectible.
Excerpt from MpGallery

Got any reissues in your collection? Be sure to take a look at our Prints & Poster section of the BU site to make sure they stay pristine for years to come!