Please help in identifying this coin. Seems ancient coin

Please try to provide more information, such as weight and diameter. 

Besides being careful with the focus of the photo, it's difficult, but there are ways to improve. 

Some tips for better photos are: place the coin on a flat surface, try placing your camera (professional or cell phone) on a stand, it can even be improvised, but this prevents it from shaking. And always choose a well-lit location.

I can se it has a cross on one side, and on the other, i think its a castle. So it can be as a Spanish or Portuguese coin. The year is probably around 15th and 16th century. Need better photos and the weight/diameter to narrow the options.

Thanks a lot for the insights. Truly grateful.

coin weight is 4.10 grams.. Diameter is 19 mm.

will share clear images of coin.

Antonyo

Thanks a lot for the insights. Truly grateful.

coin weight is 4.10 grams.. Diameter is 19 mm.

will share clear images of coin.

With the weight and diameter, it was possible to narrow down the options by searching for pieces registered within that weight and diameter range that have a cross and stars on the reverse. This was the only piece I found that fits the description.

N#301283

BUT don't take this as a definitive answer because your coin is in a very worn state, and unfortunately, nothing can be identified on one side.