I believe this was made in 1974(see photo of tech's signature and date). I've owned it since 1976 and have hardly used it as I never became a super star playing in large venues. I use a smaller Mesa 5:50 for my home jams.
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The full title: 1974 100w Marshall MKll Super Lead (see photos).
Back in the day I had new KT88 tubes installed and all the biases checked. It has very few hours of use on it during my ownership. It works great. One of the pots (controls) is a little scratchy.
There are only a couple superficial dings and it is in fairly "cherry" condition.
Call if you have questions.