1981 Marshall JMP 100w 2203, black. Made in UK, serial number 01659N. This amp is all original, except for the tubes (NOS Sovtek and Groove Tubes EI), a few screws and an added direct line out. The power switch is a bit wobbly, but the amp operates nice and quietly. Clipped bright cap on the pre-amp volume pot. The quintessential master volume Marshall tone!