Celtic Britain, Iron Age. Iceni. AR Unit, 10-30 AD. Antedios And D-Bar Type.
 
Obv: Two opposed crescents emblem with two pellets between set on vertical wreath. Rev: Horse right with corn-ear mane, pellet triad and ATD monogram below.
 
Reference: S. 441, ABC. 1645.
 
A well struck example, attractive in the hand with good eye appeal.