Thanks. Do you think its is from the reign of Sebastiao?
I'm thinking it's from the reign of one of the Spanish Philips (II, III or IV) who became the kings of Portugal as Philip I, II and III.
Don....
This is not possible my frind. If you look to the coind you can read " ANUS .I.R" sebastianus I rex. This type of coins " ceitil" was ended in the reign of sebastianus I.. So, when portugal was under the spanish Phili's don't had this type of coin.