Iron Edo Higo School tsuba decorated with phoenix and paulownia. Inlay made of two gold alloys applied with nunome zogan. This example is in very good condition for this type of tsuba.
I have found a similar tsuba online, and according to the source it has been attributed to Masayasu. However there is no pictures of certificate so I can't be sure If this information is correct. Please scroll to the bottom of the page.
https://www.japaneseswordsocietyofcanada.org/tsubasamples.html
Made in Edo period.
Size: 83 mm x 77 mm x 5 mm