This is Embassador Flag of Siam designed by <a href="https://en.wikipedia.org/wiki/Rama_VI" class="extiw" title="en:Rama VI">Vajiravudh</a> in 1912. The flag features dressed white elephant on red background, facing a flagpole. On its canton, there is blue circle containing Garuda holding crown. Not in use now.
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> .
2008-09-26
Self-made, based on <a href="//commons.wikimedia.org/wiki/User:Xiengyod" title="User:Xiengyod">Xiengyod</a>'s image on his site. <a rel="nofollow" class="external autonumber" href="http://www.bloggang.com/viewblog.php?id=xiengyod&amp;date=12-11-2007&amp;group=6&amp;gblog=13">[1]</a>