1st Observation Squadron emblem.  Approved for 9th Airship Company 3 January 1933.
<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>
1933-01-03
<a rel="nofollow" class="external free" href="http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/432415/41-electronic-combat-squadron/">http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/432415/41-electronic-combat-squadron/</a> edited with Microsoft Paint