This coin is a Whaddon Chase Type.
Obverse: Devolved head of Apollo right. Two 'wings' above the laurel wreath.
Reverse: Horse galloping right. Pellets above, bean to right and pellet-in-annulet below.
History: The Trinovantes were originally located on the north side of the Thames in Essex and Suffolk. Their main centre was Camuldunum (Colchester).
Date: Circa 55 - 45 BC.