I recently bought a traditional Viking striker, Bronze striker kit, by Jean the Hornmaster and doing some research into it I have found out some more info on it.
The bloke who did the casting did a copy of an original from an archaeology dig (Birka, Sweden?).
The bronze design represents Odin in the center and his two ravens, Huginn and Muninn whispering what is happening in the world of humans.
an original
mine
He did a brilliant job at reproducing the striker IMO.
Some of his other work.