Perfect spare parts match for my SWR Grand Prix bass preamp (red face version but, they are the same of the green one). They are exactly the same of the original mounted by SWR on their amp and preamp back in the days. If you're missing some knobs on your amp especially most of the model produced or updated right before or after swr merging in Fender, these knobs are equal to the original.
Perfect match for my SWR amp
By Enrico Galetta from on 5/24/2017
Great service by Best Bass Gear in assisting me answering to all my questions before my purchase and with a quick delivery.