Used Rothwell Tornado Overdrive
The Tornado is a class A, single-ended overdrive using JFETs throughout. The close similarity between the electronic characteristics of JFETs and valves allows the Tornado to be effectively a pre-amp in the classic guitar amp format, but implemented in miniature and running from only 9 volts instead of the 2 or 3 hundred volts required in a valve guitar amp. The result is an overdriven sound that is much closer to that of an amp rather than a typical pedal but with pedal convenience. Plus, back in 2015 it made it into MusicRadar's list of top 12 overdrive pedals!
This pedal is in excellent used condition, with very few minor cosmetic blemishes