Montreux Original Brand Early Bird Prototype? Two types of distortion pedals, with adjustment knobs. ◾️Distortion 741 ◾️Vintage Distortion I haven't seen these very often. The 741 is said to use the same op-amp as the MXR distortion+, and the sound is similar. Slight dirt on the back. Clean on the front. 741 is missing two screws. Thank you for viewing. Please understand that these are used items.