medalion

This was originally found in forest in dirt. Was traded later on. Found somewere in Norway It is non magnetic. Looks like lead on Silver , or lead on tinn Can Anyone help identyfie Measures 6 cm or approx 2.35 inch

I found this medallion in my late fathers belongings...I presumed it was Templar or heraldic due to the images on the reverse..st cristopher. Jerusalem, paris/Vatican and unknown figures. Sadly I could be completely wrong. the front shows what looks like links or rings with a central wheel...