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"A 16th century Yoshiro Zogan tsuba. The type is named for a Kaga province artist considered to have advanced the late Onin period brass inlay art to that of hira-zogan - flush with the iron surface. The school also took hold in other provinces, most notably Bizen. The mokko-gata form of this tsuba would appear to be uncommon for Yoshiro Zogan tsuba particularly of katana size. Eight ka-mon are inlaid in open work fashion. The remaining surface decorated with a network of brass inlay depicting algae. Hitsu-ana for kozuka and kogai also lined with brass. From the Onin period when brass inlay became popular, the metal was highly valued. This tsuba is late Muromachi period to possibly Momoyama period. It is in very good condition with apparently uneven rubbing to some of the inlaid brass while the patina on iron surfaces is undisturbed. The very light, old loss of brass inlay is good as this type of brass inlay often sees more loss as the underlying iron surrenders surface with oxidation. About 3 1/4 inches (9.53 cm) high, about 3 1/8 inches (7.94 cm) wide, about 5/32 inches (4 mm) thick."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.trocadero.com/stores/spoilsoftime/items/1342321/Yoshiro-Zogan-Iron-Tsuba-Brass-Inlaid-Algae-Sukashi-Mon-Decor>