http://en.wikipedia.org/wiki/File:Polis ... a_1939.jpg


This photograph is in the public domain because according to the Art. 3 of copyright law of March 29, 1926 of the Republic of Poland and Art. 2 of copyright law of July 10, 1952 of the People's Republic of Poland, all photographs by Polish photographers (or published for the first time in Poland or simultaneously in Poland and abroad) published without a clear copyright notice before the law was changed on May 23, 1994 are assumed public domain in Poland.
This work is in the public domain in the United States because it meets three requirements:

it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1978 without complying with U.S. copyright formalities or after 1978 without copyright notice,
it was in the public domain in its home country (Poland) on the URAA date (1 January 1996).