M04 Tsuba (hand guard) depicting autumn grasses and butterflies in a Mokko (quatrefoil) shape, iron, unsigned. Sukinokoshi mimi (unworked rim). Takuniku-bori (high-relief carving), gold and silver inlay. Tanto (short sword) tsuba. Hamidashi (protruding), Kudashi (a type of carving). SDA (likely an abbreviation for a collection or reference). ‐ Mercari: Shop from Japan