The Reverb 12 is the undisputed King of the Kalamazoos.  Same pretty, grungy-when-pushed-tone as the Model Twos, same ringing trem but louder and with creepy, teeth tingling reverb.  The addition of separate treble & bass controls opens a whole world of non-Fendery tonal options compared to the cheaper models.  The Reverb control is independent of the volume, so you can go 100% wet if that's what you want.  The two button footswitch for the trem & reverb is original.  In fact aside from a few caps and the speaker, it's all original as far as I can tell.  The big magnet WGS 10 inch we put in here is one of the best our there and definitely perfect for this amp.  A rare gem!  Requires a step down transformer to work at UK voltages.