In my opinion, what you have is likely a medal of some sort commemorating the end of his mother's regency based on the date. However, I'm unsure as to its authenticity and value, in the meantime, I'd wait for other members to chime in. https://www.pegasusauctions.com/zk76-sweden-karl-xi-bronze-token-medal-1672-o25mm-5-94g
