Vox 1965 'King of the Beat' catalogue, page 9. Four Vox amps are shown here: the Cambridge Reverb, Kent, Essex bass and Viscount.
The Vox Viscount is described as follows:
A handsome, rugged, professional amplifier unsurpassed for the professional musician, built to withstand the hardest professional usage; three channel amplifier with 6 inputs. EXCLUSIVE VOX engineered Brilliance channel for maximum treble boost. Bass boost control coupled to this channel provides wide tonal separation. Exclusive VOX VIBRATO/ TREMULANT providing wide range of vibrato. Two 12" heavy duty VOX loud-speakers. 60 watts peak power output. Waterproof cover supplied.