@cyntintin: Why wouldn't they all wear the same one? Talbot said that there are multiples.
And yes, I know about the flashback - what I mean is, we have yet to be explained why it's taken Eric so long to even find Russell, because presumably he had no idea at first.
@Dyn: Ummm.... didn't Talbot say he had a number of crowns? They never said it was definitively the exact crown. Presumably Russell massacred many of Eric's father's Viking King brethren, clearly for some sort of yet-to-be-relevant purpose.