This was a special build using EL34 power tubes instead of four EL84s. The amp is in good condition and operates as it should. New it cost $1775.
The amp has a Normal (dark) channel, internally jumpered to a Bright channel. Use one or mix both to suit your taste. A gain switch cascades channel one into channel two for an extra effect.
There is a full tone stack: treble, middle, bass, a master volume and a presence control.
Three 12AX7 preamp, A pair of Svetlana EL34s and a JJ 5AR4 rectifier.
The amp is a blend of the two British amp makers from the 60s.