One has the pedal shown on a grey table, and the other on a greyish-blue. (See last picture for comparison).
Vintage Mxr Guitar Effects Pedal Literature Spec Sheets ~Blue Box~ 70's-80's
Vintage Mxr Guitar Effects Pedal Literature Spec Sheets ~Flanger~ 70's-80's
Vintage Mxr Guitar Effects Pedal Lit Spec Sheets ~Graphic EQ 10 Band ~ 70's-80's
Vintage Mxr Guitar Effects Pedal Brochure Spec Sheets ~Distortion~ 70's-80's
Vintage Mxr Guitar Effects Pedal Literature Spec Sheets ~Micro Amp~ 70's-80's
Vintage Mxr Guitar Effects Pedal Brochure Spec Sheets ~Compressors~ 70's-80's
