The Soviet RD-0120 (also designated 11D122) rocket engine on display at the K. E. Tsiolkovsky Museum of the History of Cosmonautics.
<a href="//commons.wikimedia.org/wiki/User:Stolbovsky" title="User:Stolbovsky">Stolbovsky</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>