Rolls Royce RM5 Avon RA 7R jet engine for the Swedish Saab 32 Lansen fighter jet, from the 1950s.
<a href="//commons.wikimedia.org/wiki/User:Bjoertvedt" title="User:Bjoertvedt">Bjoertvedt</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>