2 inch diameter navy blue wool patch with white inner border and letters "PT" and a live torpedo showing waves.
<a href="//commons.wikimedia.org/w/index.php?title=User:Hhbooker2&amp;action=edit&amp;redlink=1" class="new" title="User:Hhbooker2 (page does not exist)">Hhbooker2</a>
2011-02-19
<span class="int-own-work" lang="en">Own work</span> This is from my own collection