Description:
Two levels of coil, each inside a thin black cover, inside an upright metal frame. The frame is mounted on a black, rectangular base, which looks like it consists of a stack of three metal plates. There are several pegs attached to the base on either side of the frame. A black cord extends out of each of the coils and is attached to two small screws in front of the frame. The CHSI reference number, 1997-1-0235, is etched in white on the base in front of the frame.