Built by Gates Radio, the "Diplomat" monaural  console from the mid-60's. Gates Radio was founded in 1922 by Parker Gates' father, Henry C. Gates. As a pioneering company, Gates invented many different pieces of equipment for the broadcast industry. In 1957, Gates Radio was purchased by Harris Corp, although the Gates Radio logo was used until 1975 when Harris dropped the "Gates Division" and relabeled the products as "Harris."  Existing products were re-labeled "Harris."   (Courtesy of http://www.videopark.com/oldbroadcast.htm and Barry Mishkind)