Philips model 796A, 1936-1937
This radio was produced in Europe in a variety of versions. The early Dutch version still used A-type (4V heated) tubes. This is a French version, incorporating the first of the red E-tubes which were later fitted to the Dutch version as well.
The single knob incorporates all the primary controls in a 'joystick' knob plus outer ring. The radio is tuned by rotating the knob. The volume is controlled by moving the knob in the vertical plane. The horizontal plane controls the tone (treble cut) as well as altering the IF bandwidth by altering the coupling in one of the IF transformers. The outer ring, chromed brass over Bakelite, controls the power switch and waveband/PU switch.