Works with MA Series and JCM800 series. Be sure to check compatibility with your amps manual or contact Marshall. Used so has some marks (see pics)
Marshall PEDL-90010 2-Button Clean: Crunch / Overdrive FX Amp Footswitch
Hiwatt T40/20 Mk III, with Hiwatt footswitch. NOT Marshall.
MARSHALL PEDL- 90010 2-Way Footswitch pedal Clean/Crunch & Overdrive Boxed
Marshall JMP-1 Valve MIDI 1U Preamp w/ Footswitch
Marshall DSL1HR Head Guitar Amplifier and Footswitch
Marshall 2-Button Footswitch PEDL-00009 Channel / DFX for MG Series Amplifiers