Joseon dynasty (1392-1897), 19th century The conical bowl constructed of two russet-iron plates riveted along the front and rear, the seams covered with two vertical flanges hammered up with a central ridge, the peak fitted with a cap supporting a fixture for displaying a plume, the scalloped visor decorated with lightning patterns and scrolling foliage in silver flush-inlays, fitted with a fabric neck guard applied with circular brass plates 12 1/4in (31.1cm) high, the bowl only