???, Three-Footed Stand (Kongoban) for Buddhist Ritual Implements, Kamakura period (1185?1333), 13th century, Japan, Gilt bronze, H. 1 1/2 in. (3.8 cm); W. 8 1/4 in. (21 cm); L. 11 1/4 in. (28.6 cm), Metalwork, For Esoteric Buddhist ritual prayer and