File:US Post Office, Rockford, Illinois 1951 postcard.jpg

Other information

This postcard image is in the public domain because it was published in the United States some time between 1933 (when the building was built according to the back of the card) and 1951 (when the card was postally used according to the back of the card) without a copyright notice. Postcards published in the US between 1923 and 1977 without a copyright notice are in the public domain. See https://www.webcitation.org/6h4M826Jr?url=http://www.ebay.com/itm/1951-Illinois-Postcard-Rockford-Post-Office-/371604596084?hash=item56855c2574:g:Lk0AAOSwgQ9V0iJ8 for an archived image of the back of the card showing postal use in 1951 and no copyright notice.

This work is in the public domain because it was published in the United States between 1929 and 1977 inclusive, without a copyright notice. Unless the author has been dead for several years, it is not in the public domain in countries that do not apply the rule of the shorter term for US works. This includes Canada, China (not Hong Kong, Macao, or Taiwan Area), Germany, Mexico, Switzerland, and other countries with individual treaties. See also further explanation. PD-US Public domain in the United States //en.wikipedia.org/wiki/File:US_Post_Office,_Rockford,_Illinois_1951_postcard.jpg