These photos were taken by Thomas T. Hammond during his trip to the Soviet Union. This specific image features people reading an advertisement for tourist photos that can be taken in the Kremlin and sent home by mail.
<a href="//commons.wikimedia.org/wiki/Category:Thomas_Taylor_Hammond" title="Category:Thomas Taylor Hammond">Thomas Taylor Hammond (1920-1993)</a>
CC BY-SA 4.0
University of Virginia Center for Russian, East European, and Eurasian Studies (<a rel="nofollow" class="external text" href="http://www.virginia.edu/creees">www.virginia.edu/creees</a>)