A Squadron shoulder patch used by RCAF Aircrew with 3 All Weather (Fighter) Operational Training Unit - 3AW(F)OTU, circa 1957-'59. The Unit was initially stationed at North Bay in 1953, moved to Cold Lake and later, Bagotville.  The back-stamp, confirming the Crest was manufactured by Crest Craft, was only found on crests manufactured between 1957 through 1959.
<a href="//commons.wikimedia.org/wiki/User:A_much_better_place" title="User:A much better place">A much better place, Wayne Logus</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span> scan of patch. Originally manufactured by Gustav Werle, founder of Crest Craft Ltd. of Saskatoon, SK.