99th Organizational Maintenance Squadron emblem
<a href="https://en.wikipedia.org/wiki/United_States_Army_Institute_of_Heraldry" class="extiw" title="en:United States Army Institute of Heraldry">en:United States Army Institute of Heraldry</a>
<a rel="nofollow" class="external free" href="https://www.ebay.com/itm/60s-70s-99th-ORGANIZATIONAL-MAINTENANCE-SQUADRON-patch-/273676177335">https://www.ebay.com/itm/60s-70s-99th-ORGANIZATIONAL-MAINTENANCE-SQUADRON-patch-/273676177335</a> edited with Microsoft Paint