Question: What is is a concave golden disc of a weight of 25.23 g and a diameter of 4.5 cm, that had a king of Denmark and Norway was mentioned in the inscription of the disc?
Sentence (from "Curmsun Disc"): Curmsun Disc is a concave golden disc of a weight of 25.23 g and a diameter of 4.5 cm .
Relevant evidence: Yes