This is the third generation Super Beatle V1143, introduced in 1967 with expanded and refined abilities of the original Super Beatle. The V1143 added a new feature called, "Repeat Percussion," which was a variation of tremolo. Repeat Percussion takes tremolo to the extreme by turning the signal completely on and off at varying rates of speed, making a "chattering" type of sound. This effect was used on the vocals at the end of "Crimson and Clover" by Tommy James and the Shondells. It also features more modern FET switching transistors in the Distortion Booster and MRB circuit. Overall, the head and cabinet are both in great working order with general wear and scuffs you would see on an amp of this age. local pickup only.