This is a vacuum tube amplifier I purchased new. It appears to be handmade by an amplifier builder. I've only used it for a few hours. There are no operational issues. There are a few minor scratches on the case. There's a noticeable scratch on the top surface. Since it's not a manufactured product, there are some paint unevenness and case distortions. The paint is apparently Asahipen Gray Metallic. Please touch it up if you're concerned. A handwritten circuit diagram and wiring diagram by the maker are included. --- Following is the Mercari AI-generated text --- 6F5P single power amplifier with two vacuum tubes, featuring independent left and right volume adjustment. - Model: 6F5P Single Power Amplifier - Power switch: Yes - Volume adjustment: Independent left/right adjustment - Vacuum tubes: 2 installed - Color: Blue Power amplifier Integrated amplifier Vacuum tube amplifier Gray metallic