License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Sukemitsu of Bizen. Blades and Mountings for a Pair of Swords (Daishō), sword (katana) blade, dated 1440; short sword (wakizashi) blade, 15th century; mountings, late 18th century. The Metropolitan Museum of Art.