Coat of arms of Trinity parish, Jersey (British channel islands), containing a version of the Shield of the Trinity diagram.  These arms appeared on a 1976 Jersey stamp and a 1988 Jersey coin.  For different artistic renditions, see the sites http://www.ngw.nl/int/cha/trinity.htm , http://www.jeron.je/thatwasjersey/t.html etc.

Other version on Wikimedia Commons: Image:Blason ville uk La Trinité (Jersey).svg .