I just inherited my father's 1983 Mesa Mark IIB. 100 watt, simul-class with GEQ and reverb. Original EVM 12L speaker. Haven't fired her up yet. It's sat so long, I anticipate a service trip. Fortunately there is a certified Mesa tech very close to where I live. Factory footswitch is missing, already found a replacement. Original cover is pretty worn out, too, but have a great line on a replacement for that, too. Even found a Mogami cable tucked inside the combo body. What a great way to end my week!