Based off pictures found at the following links: <a rel="nofollow" class="external autonumber" href="http://shields.aaroads.com/salespage.php?state=AZ">[1]</a>;<a rel="nofollow" class="external autonumber" href="http://shields.aaroads.com/thumbs.php?state=AZ">[2]</a>. A pre-1956 Specification Arizona State Route Shield, traced from a picture of a real shield.
<a href="//commons.wikimedia.org/wiki/User:White_Star_Line_Fan" class="mw-redirect" title="User:White Star Line Fan">Matthew Anderson</a> (based on an original .JPG format picture found at the AARoads shield gallery.)
<a rel="nofollow" class="external autonumber" href="http://shields.aaroads.com/show.php?image=AZ19601641">[3]</a>