This is a Yamaha J-35, a Japanese vintage transistor guitar amplifier with a spring reverb. There are minor scratches and wear and tear due to age, but it is in relatively good condition. Sound output has been confirmed. The spring reverb is also working well. There is some crackling in the treble knob (does not affect performance). I have only tested the sound output at low volume indoors, so I am not aware of any buzzing or noise issues that may occur when playing at high volumes. The previous owner made the following modifications: ・The front panel has been replaced with beige canvas fabric. ・The speaker has been replaced with one labeled ST-15 (after searching for ST-15, it appears to be an 8-inch speaker likely removed from a Fender Japan Studio 15 guitar amplifier). I am not responsible for any malfunctions or damage during shipping caused by the above points.