Here’s a ’83 Marshall JCM800 4104 2 x 12” 50 watt guitar combo amp. It has been recently serviced and has a clean bill of health. This vertical input 800 roars like a Marshall should. This is one of the years that the circuit is still very close to a late 70’s JMP. Nice crunchy sounding master volume amp. One time in its life it was in a humid environment as the speakers have a light patina on the metal frame. The paper cone is in good shape and sounds as they should. See pictures for condition.