64 pounder, 64 cwt, Rifled Muzzle Loading Mk3 (1867 pattern) gun. The gun was manufactured by the Royal Gun Factory, Woolwich, England. Historical display at Fort Glanville, South Australia
<a href="//commons.wikimedia.org/wiki/User:Peripitus" title="User:Peripitus">Peripitus</a>
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<span class="int-own-work" lang="en">Own work</span>