A CIRCULAR IRON TSUBA formed as a kiku, the large kozuka-ana plugged with shakudo and similarly carved, signed Masatsugu, late 17th century, 7.8cm.; a circular late Owari tsuba with birds and geometric motif, 17th century, 7.1cm.; a circular iron Owari tsuba with myoga design in yo-sukashi within the roped rim, (the latter worn), 17th century, 7.4cm.; a rounded-square Owari iron tsuba pierced with wild geese, distorted, 17th century, 7.1cm.; and a mokkogata iron tsuba with a hammered plate and inlaid constellation, 19th century, 8.7cm (5)