Marconi Five-Valve Receiver, by Marconi Company, London, 1922

Marconi Five-Valve Receiver, with one 'Q' and four 'V24' valves (marked "H.F.", "H.F." "RECTIFIER" and "NOTE MAGNIFIERS"). With anode and aerial inductance dials (both scales 1-10), two aerial tuning condenser knobs (both scales 0-90), and other assorted Bakelite? and ebonite dials. Assorted dials include potentiometer H.F. valves, filament h.f. valves, detector filament, note magnifier filaments, reaction coupling (all scales 0-50); additional switches for note magnifiers (0,1,2), output (phones, loud speaker), on/off switch and valve switch (1,2). Controls are on sloping ebonite? vertical panel with two 'phones sockets, and is enclosed by doors in teak case. With nickel-plated aerial and earth terminals on top; plugs on side for High Tension battery and Low Tension accumulator and connections for Loudspeaker.