Designated as the 1967 circuit, the Major is the largest amp in the Marshall lineup, delivering a powerful 200 watts. Originally intended for bass, it offers massive clean headroom but can also be pushed into colossal saturation. Its commanding sound comes courtesy of GEC KT88 tubes and a hefty set of Dagnall transformers. This is the amp behind the sound of guitar greats such as Ritchie Blackmore and Mick Ronson.
The oldest dated part in the amp is a late 1969 pot code, so the amp is likely from early 1970. Since many fewer units were made than the 50/100w amps it is fair to assume they had plexi panels left in early 1970, before switching over to the metal panel design.
Only 1,200 units were produced between 1967 and 1974, with the Plexi version being the rarest. The front Plexi panel has been replaced with a modern reproduction, but the rear panel remains original, featuring the signature vertical logo. The amp has held up well over the years, and internally it remains all original. See circuit pictures for further details.