NPD: BK Butler Tube Driver. Some thoughts and comparisons to TD-like pedals within : r/guitarpedals
Guitar Pedal X - GPX Blog - 6 of the Best Butler Tube Driver Style Pedals
The B K Butler Tube Driver has been used by several of Rock Guitar's greats - David Gilmour and Eric John… | Guitar pedals, Distortion guitar, Guitar effects pedals
BUTLER AUDIO Original Tube Driver w/ Bias | Deluxe Guitars
USED BK Butler Tube Driver - The 'Real Deal' Tube Driver from the Original Designer - Matt's Music Center
B.K. Butler Tube Driver 1980s – Chicago Music Exchange