This is a very nice Tôshô tsuba from the late Muromachi to early Edo era. Tôshô tsuba are tsuba that were made by sword smiths and they can be dated back to the Kamakura and Heian eras. In those days, it was not uncommon for a sword smith to make a tsuba to be delivered with a sword that was made to order by a Samurai.
This is a large round tsuba measuring a full 3.46 inches or 8.8 cm in diameter. It is of a thin iron plate which is typical of the older examples of tsuba from this school. The thickness of the plate is 0.13 inches or 0.33 cm. It bears a simple negative design of a gourd and a small circle.
The patina of the iron is excellent and there is no rust or pitting. It is an excellent example and comes with NBTHK Hozon papers attesting to its authenticity, quality, and condition. It is priced very attractively for a quick sale.