Bronze Religious Medal Found on Beach

Description

Bronze religious medallion featuring a detailed depiction of the Virgin Mary holding the child Jesus. The surface shows heavy wear, corrosion and traces of sand embedded into the patina, suggesting long exposure to moisture and the elements.
The reverse is completely blank and undecorated, with no inscriptions or identifying marks.
Found with a metal detector on a sandy beach along the Spanish coastline.
Its worn condition and lack of inscriptions make the exact age, origin and purpose of this medallion uncertain