Thank you for contacting Mearto with your appraisal inquiry. This Kris knife is likely from the 18th or 19th century. It has a beautiful pattern in the steel, and the handle carving is in excellent condition. The sheath is also in excellent condition, with no visible damage or wear. The brass does not seem to be corroding at all. The steel has some spots of surface rust forming, although it could likely be stabilized. Given the condition of this piece, and completed auctions of similar items, a fair market estimation is 550-600 pounds. Please reach out with any questions. Bo Stuck
