Vintage Deluxe EL34 Triode jazz amp 20RR12

EL34 20 watt cathode biased power amp with GZ34 rectifier.
Optimised for jazz guitar, the tone stack has Gain, Bass Middle Treble and a rotary Hi-Treble (instead of the traditional Bright switch), reverb Dwell and Mix, and Master Volume. 
Weber 12F125S 12”speaker