There are no copyright marks on the item. At bottom left are some numbers which appear to be connected with the printing of the poster and "Country of origin USA. There are also numbers at lower right which appear to be associated with the printing of the poster.
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
== Summary == {{Information |Description=Poster for the 1930 film ''The Sea Bat''. |Source=[http://web.archive.org/web/20160514162336/http://1.bp.blogspot.com/-MaWjDVTMkxo/TnnPGWIVOzI/AAAAAAAAA20/A1P1PUefOx0/s1600/THE_SEA_BAT+poster.jpg source] |Date=[...
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