on a bronze french cannon, the relief of coat of arms of Prince <a href="https://en.wikipedia.org/wiki/Louis_Charles,_Count_of_Eu" class="extiw" title="en:Louis Charles, Count of Eu">Louis-Charles de Bourbon</a> (1701-1775), Count of Eu, Duke of Aumale, last <a href="https://en.wikipedia.org/wiki/Grand_Master_of_Artillery" class="extiw" title="en:Grand Master of Artillery">Grand Master of the Artillery of France</a>, General-colonel of the Suisses &amp; the Grisons. Honor Courtyard of Invalides, Paris
<a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>
<span class="int-own-work" lang="en">Own work</span>