Most Knight radios are listed under Allied. Here is a list of models. Any numbers like these on your radio? If not listing tubes may help?
http://www.nostalgiaair.org/Resources/021/T0000021.htm
Norm
:HAVE AN OLD KNIGHT BROADCAST/SHORTWAVE W/6 PUSHBUTTONS AT TOP & 4 KNOBS ON FRONT.ONLY # I CAN FIND IS 25-174589.THE 25 IS PRINTED & THE OTHER #'S ARE EMBOSSED.ANY HELP ON IDENTITY WOULD BE APPRIECIATED.