64 Pdr. Muzzle-Loading Rifled Mark III Gun at the Toowoomba Botanic Gardens. Manufactured by the Royal Gun Factory in 1878.
<a href="//commons.wikimedia.org/wiki/User:Kgbo" title="User:Kgbo">Kgbo</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>