This is a sword fitting (fuchi) from a Japanese sword of unknown age. The exterior has discoloration, stains, and white, possibly corroded deposits, so the appearance is not good. It is a fuchi that was attached to a sword by Fujiwara (name unclear), and the material is metal, but it is not magnetic. It feels like copper, but the material is unknown. Please consider it for your collection, etc. It is sold as-is, with no guarantee, and is considered junk. Only those who understand this are welcome to purchase.