Opium Scale. a) Lower part of the wooden case b) Scale with the plate tied with 4 strings c) Weight made of bronze d) upper cap of the case SRJC Property Tag Number: 72826 Materials: Case is made of teak wood, Scales are Brass, Weight is bronze and Beam is buffalo bone. Age: Early 19th Century Hand carved teakwood case with large brass scales and buffalo bone beam and bronze weight. Opium scales like this were used throughout Southeast Asia and China when the substance was widely used in the region. Most notably opium was produced by the Lisu Hill Tribe.