HMAS Derwent (DE 49) QF 4.5-inch Mk I – V naval gun, Rockingham Naval Memorial Park, Western Australia. The gun turret was recently repainted, see <a href="//commons.wikimedia.org/wiki/File:HMAS_Derwent_(DE_49)_gun_turret_at_Rockingham_Naval_Memorial_Park,_February_2020.jpg" title="File:HMAS Derwent (DE 49) gun turret at Rockingham Naval Memorial Park, February 2020.jpg">File:HMAS Derwent (DE 49) gun turret at Rockingham Naval Memorial Park, February 2020.jpg</a> for this.
<a href="//commons.wikimedia.org/wiki/User:Calistemon" title="User:Calistemon">Calistemon</a>
<span class="int-own-work" lang="en">Own work</span>