The helmet bowl Momoyama (1573-1615) or Edo (1615-1868) period, 16th-17th century, the menpo and wakidate later The simple bowl constructed of six russet-iron plates banded by a koshimaki plate with a peak mabizashi, the five-lame Hineno-jikoro lacquered red and laced in blue sugake style lacing, the later wakidate lacquered gold and formed as flames; the red-lacquer menpo forged in two sections with deep wrinkles and flanges before the ears, applied with a stiff bristle mustache and chin tuft and a three lame yodarekeke laced in blue With a Tokubetsu kicho shiryo (Important Material) certificate no. 1634 issued by the Nihon Katchu Bugu Kenkyu Hozonkai (Society for the Study and Preservation of Arms and Armor), dated November 13, 2016