The Ultimate RU was made by Auckland Radio 1936 and came in a 16" wide by 12" high bakelite cabinet. They were a two piece cabinet, the front grill piece is screwed on from the back. There were different colours as well as some being painted white, the redish brown was not as common because these models were often painted to hide the colour.The one on the left was a painted one which I stripped, they are quite attractive in this colour.The RT model is a dual wave version and has 4 knobs on the front.
  The valve line up is a 7A8,7A7,7C6,7C5,& 5Y3 rectifier.