A <a href="https://en.wikipedia.org/wiki/bombsight" class="extiw" title="w:bombsight">bombsight</a> PS-1 (ПС-1). USSR, 1941. <br>The <a href="https://en.wikipedia.org/wiki/Central_Air_Force_Museum" class="extiw" title="w:Central Air Force Museum">Central Air Force Museum</a> in Monino, Russia.
<a href="//commons.wikimedia.org/wiki/User:Dmitry_Ivanov" title="User:Dmitry Ivanov">Dmitry Ivanov</a>.
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>