This is a very nice iron tsuba of the Kamakura Bori school. The name of this school refers to the style of carving rather than the historical era of creation. This tsuba is quite old and probably dates to the early to middle Muromachi Era of the 15th century. It is a large round tsuba measuring 9 cm by 9 cm or 3.5 inches by 3.5 inches. It has a stylized dragon carved on the right side of the tsuba with its tail extending all the way around to almost touch the head on both the obverse and the reverse side of the tsuba . The eyes of the dragons are small gold dots. The overall condition of the tsuba is excellent with only a little pitting on the reverse. We see this quite often on these types of tsuba. . You will note that there are no hitsu ana carved into the thin iron plate thus preserving this tsuba in its original design format. This is a very desirable feature. This tsuba comes in a custom made double presentation box. It also has NBTHK Hozon papers attesting to its condition and quality.