Potez XVIII photo from L'Aéronautique December,1922
L'Aéronautique magazine
<a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k96729940/f140.item">https://gallica.bnf.fr/ark:/12148/bpt6k96729940/f140.item</a>