Many think of the Peacemaker as a Plexi but it can do so much more. Super early build (serial number 0074!) and still in great shape.
Here's the description right from the horse's mouth:
The PeaceMakeris a non-master volume amplifier equipped with (4)-EL34 power tubes and (4)-12AX7 Pre-amp tubes. The uniqueCurrent Tracking Technology utilized in thePeaceMaker's preamp provides an increased sensitivity and clarity, with half the noise of other preamp technologies, while still delivering a high level of gain capacity. This proves to be very useful for recording and generally getting a better more organic quality of sound.
High gain applications do not have to be plagued with a buzzy overall tone or harshness that fatigues the ear. The best guitar tones are the ones that call out to be heard again and again, without pushing fatigue on the listener. It is for this reason that the PeaceMaker is the ideal amp for those seeking to develop their own signature sound.