Rare example, just about 5/8” diameter and unmistakably shaped to emulate a link of riveted mail. Circular section with about a third of its circumference thickened with a seam as found with the joint of riveted mail. Silvered bronze. Worn in numbers on the surface of the jerkin, these small metal brooches provided a measure of protection against sword cuts and, in fact, were a form of armor. See current Public Television programming for documentation of these in action. As protectors, they also held spiritual significance for the warrior. Professionally refurbished with the silver overlay restored and suspended from a sterling silver neck chain for modern wear Jewelry giftboxed with a certificate of authenticity.