Muromachi period (1336-1573), late 14th/early 15th century The heavy bowl constructed of 28 iron plates riveted together, the rear of each plate with a standing ridge, all covered in black lacquer and mounted in nijo shiho style with the front and rear plates covered with a gilt-copper plate engraved with scrolling vines and applied with shinodare, the base with igaki, the crown adorned with a five-stage chrysanthemum tehen kanamono, the front of the helmet with a kuwagata-dai pierce-carved with chrysanthemum scrolls and fitted with gilt-brass kuwagata and a gilt-wood maedate carved as a large peony blossom, the five-lame lacquered-iron shikoro laced in blue lacing in kebiki style finishing in fukigaeshi applied with gilt-brass manji heraldic crests, the fukugaeshi and mabizashi both applied with stenciled doe skin and trimmed in gilt-brass fukurin With a Tokubetsu Kicho Shiryo (Especially Important Material) certificate issued by the Nihon Katchu Bugu Kenkyu Hozon Kai (Society for the Study and Preservation of Japanese Armor)