This amp is in great condition, and has only minor signs of previous wear. This is from the "drip-edge" era of Fender amps, and the Showman Reverb is essentially a head version of the Fender Twin. Like the Twin from that era, the circuit is a hybrid version of the AB763 called the "AC568", used for a brief time in 1968, and features a partially cathode biased power section.This amp has changed electrolytic caps, some trem caps, and reverb cables. It still has all of the infamous "blue molded" Mallory coupling caps, made famous in the blackface era.