Coins of this type are among the earliest to have circulated, at a  time when Britain was divided into eight Celtic tribal areas.

They continued to be used alongside Roman coinage until 60 A.D.  They were no longer allowed to circulate after the Iceni uprising,
led by Queen Boudicca in that year.

GOLD STATER - Coritani  tribe (South Ferriby type)
                           30 B.C. - A.D.10  
Actual size - around 19mm diameter