Looking at the gold coins, do I see images of a horse? If so, this might be a reference to the horse goddess Epona. She was a Gaulish goddess who became a favorite of the Roman Cavalry and was perhaps transported to Britain by them. The giant chalk horse in England is thought to have been designed about the same time. One hundred to two hundred BC.
Who will go drive with Fergus now
and pierce the deep woods’ woven shade?
Good call. Also, Barry Fell pointed out Ogham phrases, such as the fingerspelling on the Gundestrup Cauldron, and in rebuses portraying animals.