met-armsarmor: Sword Guard (Tsuba), Metropolitan Museum of Art: Arms and ArmorThe Howard Mansfield C
met-armsarmor: Sword Guard (Tsuba), Metropolitan Museum of Art: Arms and ArmorThe Howard Mansfield Collection, Gift of Howard Mansfield, 1936 Metropolitan Museum of Art, New York, NYMedium: Copper, silver, gold, copper-gold alloy (shakudō) -- source link