5g, Canterbury, Ambroci -

Obv: Crownband is thick but relatively narrow.  Low central fleur. Fairly narrow bust with a rounded chin. Note the presence of a "necklace" - a row of pellets on the kings neck below his chin, this being a feature of many 5g coins. Reverse:  AMB/ROC/ION/CAN - with AM, AN ligated.  3q unclear -so cannot determine C/T type.