Flag of Formosa Province, Argentina.
Honorable Convención Constituyente de Formosa <br> (Vector graphics by <a href="//commons.wikimedia.org/wiki/User:Guilherme_Paula" title="User:Guilherme Paula">Guilherme Paula</a>)
CC BY 4.0
Based on <a rel="nofollow" class="external text" href="http://www.formosa-web.com/simbolos-02.php">this image</a>