Tanshu School, probably late 17th century
Of square form, pierced and inlaid with a gunsen uchiwa and conch shell, details inlaid with gold and silver honzogan, signed Tanshu ju Sadamasa.
8.9cm (3½in).
FOOTNOTES
鍔　軍配に法螺貝透　銘「丹州住定正」　17世紀後期頃