Shoulder Sleeve Insignia (SSI) of the 187th Signal Brigade, formerly of the New York Army National Guard.
<bdi><a href="https://en.wikipedia.org/wiki/en:United_States_Army" class="extiw" title="w:en:United States Army"><span title="land service branch of the United States Armed Forces">United States Army</span></a>
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<a rel="nofollow" class="external text" href="http://www.nysignal.org/187LINEGE.pdf">New York Signals, 187th Signal Brigade History</a>