The shield is comprised of {HEAD ~ a pair} of {TAIL ~ identical crescent shaped panels} joined together by a seam which is adjacent to a concave border of the shield 
of
The shield is comprised of { HEAD ~ a pair } of { TAIL ~ identical crescent shaped panels } joined together by a seam which is adjacent to a concave border of the shield
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH