I have the radio here now.. the 4 tubes are 6c6, 6d6, 43, 25z5 and a ballast tube k-52-h
It is a TRF... my first experience with one.
The plate on the front says 'premier' but no model number.
it has a band switch for long wave and broadcast
the dial face has a tuning knob in the center. It is marked 550 to 1700 for the BC band and 0-100 for the longwave band.
it looks very similar to the schematic of the 700LW... except that it uses a diferent ballast tube and this radio only has 1 dial lamp.
:picture is here:
:http://www.pbpix.com/airking.jpg