So there is basically no proof that there were Thumbs Rings being used in this period-this far west-rather than anything else? In that case, are there any depictions of Scythians using Thumb Rings in Greek pottery and the like? However that refers to a much earlier period (500-400 BC was the heyday afaik) than EB, so perhaps not. But the Greeks had a great deal of contact with steppe peoples through their colonies in the Bosphorus, so maybe?