This is a vintage 1969 Marshall JMP PA 20 amplifier head. Though just barely post-Plexi, this first variety brushed metal panel is otherwise identical. This particular example, serial number 3386A, is in absolutely stunning 100% all original condition. And for whatever reason, this amp is one of the best sounding specimens I’ve heard. Original down to the plastic Marshall logo, I’ll let the photos do the talking, because this is as good as they get!
This amp does include a Bulgin power cable.