Purchased in the early 80s and stored at home. Made in Japan, serial no. 283300. This is a Boss Super Overdrive SD-1. The rubber for the pedal screw is missing, but the operation itself is not a problem. The pedal switch and volume work. The check lamp lights up. The exterior has small scratches and chips, but overall, it's in good condition for something that's 40 years old. - Model Name: SUPER Over Drive SD-1 - Color: Yellow - Control Knobs: LEVEL, DRIVE - Output Terminals: OUTPUT - Input Terminals: INPUT - Check Lamp: CHECK Although the operation itself is not a problem, please understand that this is a model from over 40 years ago and that it is sold as-is, with no returns or exchanges. Thank you for looking. Type... Electric Guitar Manufacturer... BOSS