Hey guys, I am having a really hard time finding out information on this coin. I believe it is a Cornado minted in Navarre during the reign of Philip II. However, I've also seen other discussions on how it might've been minted/used in Santo Domingo (in the new world?) It'd be great to know more, thanks!
Looks a lot like this one that I have, although I'm not too knowledgeable about these Spanish coins.
You can find this coin pictured in Calico under Carlos I 1516-1556 under Pamplona It is a billon cornado (no 44) There is a free download online of the Calico book. Eklund listed it as Philip II . I would go with the Calico designation. Carlos I had a number of titles including his ones for the Holy Roman Empire that contribute some confusion. The Calico book is worth a look.