Aft 6" gun of preserved "M29" Class Monitor "HMM M33", 540 tons, completed 1915 at Portsmouth Dockyard, 07/13. After WWI, where it took part in the Gallipoli landings, and the Russian Campaign after the end of the war (Dvina River bombardments), it became a a minelaying training ship "TS Minerva".
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/58433307@N08">Hugh Llewelyn</a> from Keynsham, UK
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/camperdown/9436240697/">HMM "M33"</a>