Adapter/Lear Jet, FM Radio Adapter, Model XI

Black Stereo 8, FM radio adapter. The object is a metal black rectangular box with silver screws holding the backing. Interior of object is not visible. A black rubber cord with silver prongs at the end is attached to the top left of the box. On the front of the object is a manufacturer label with the following information in silver text: "Lear Jet; Model XI; Stereo 8; FM Multiplex Adaptor; for use with Lear Jet Stereo 8 Model ASFM-830H automotive tape cartridge player with FM radio; Lear Jet Stereo Div. 1313 Lyndon, Detroit, Mich."