English: 1956, per the copyright notice. Note that the film itself premiered in October 1955. It's not clear what accounts for this apparent discrepancy, but it's probable that these posters were printed in early 1956 as the film's theatrical run continued.
Source
English: Scan via Heritage Auctions. Cropped from the original image.
English: The poster included a valid copyright notice, seen at bottom left. However, the copyright for the artwork was not renewed, as was required by American copyright law to extend/maintain protection for works published 1963 or earlier. See the Copyright Catalog (1978 to present). In order to maintain copyright protection, the poster would have had to be renewed 28 years after publication. Because it was not renewed, copyright lapsed at that time. Note that the poster art is a distinct work from the film it represents and had to be renewed separately.
Licensing
This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain". This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.
Captions
Add a one-line explanation of what this file represents
== {{int:filedesc}} == {{Information |Description={{en|1=Poster for the American theatrical run of the 1955 film ''Oklahoma!'', based on the musical of the same name.}} |Source={{en|1=Scan via [https://movieposters.ha.com/itm/musical/oklahoma-rko-1955-one-sheet-27-x-41-musical/a/58035-55287.s Heritage Auctions]. Cropped from the original image.}} |Date={{en|1=1956, per the copyright notice. Note that the film itself premiered in October 1955. It's n...