openmct/platform/forms/res/templates/controls/select.html

<select class='form-control input select'
        ng-model="ngModel[field]"
        ng-options="o.name for o in options"
        name="mctControl">
    <option value="" ng-if="!ngModel[field]">- Select One -</option>
    <span class='ui-symbol arw colorKey'>v</span>
</select>