The item has no copyright markings on it as can be seen in the links above and in the orginal uploaded copy. At bottom left is Country of origin USA and a number which probably pertains to the print job for the card.
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.
{{Information |Description=Lobby card from the 1928 film ''The Marriage Playground''. |Source=[http://www.ebay.com/itm/The-Marriage-Playground-Vintage-Movie-Lobby-Card-Mary-Brian-amp-Fredric-March-1929-/201189105864?pt=LH_DefaultDomain_0&hash=item2ed7c...
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):