Ambassadorial Standard of Siam used between 1917-1927. This features Triranga defaced with white elephant facing a flagpole.
This  <a href="https://en.wikipedia.org/wiki/Vector_images" class="extiw" title="w:Vector images">vector image</a> was created with <a href="https://en.wikipedia.org/wiki/Inkscape" class="extiw" title="w:Inkscape">Inkscape</a> .
self-made, based on <a href="//commons.wikimedia.org/wiki/User:Xiengyod" title="User:Xiengyod">Xiengyod's</a> <a rel="nofollow" class="external text" href="http://www.bloggang.com/viewblog.php?id=xiengyod&amp;group=6">image</a> and announcement of Siamese Navy signed on March 11, 1917