Religious medallion, Lambertus pray for us, vintage

An oval medallion of aluminum with Saint Lambertus pray for us on one side and Star illuminates the city of Maastricht on the other. The star has the image of Mary with child, Lambertus has a staff in his hand. Who lives in Maastricht and knows the story of Saint Lambertus? There is a good biography of Lambertus. He was born in Maastricht around 650 and was of nobility. He received his education in the Royal Palace. Nice to know.

The medallion is in good condition.