The proprietor thought they might be from Spain, but I'm guessing Portugal from the castle with 3 towers on the front and shield with 9 symbols on the back. Here's a similar example from Numista. Is there a good way to try to attribute these? They don't seem to be dated and it's hard to make out the inscriptions. I don't have any specialty reference books for this area, and my Krause guides start at 1600. I'm assuming 1400-1500s as a likely date and copper or billon composition. Most are about 16~18 mm diameter except the bottom one which is 20 mm. Thanks!