Ship bell from aircraft carrier HMS Unicorn (1942) on HMS Unicorn which is on display in Dundee, Scotland, UK.
<a href="//commons.wikimedia.org/wiki/User:Krokodyl" title="User:Krokodyl">Hynek Moravec</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>