The exterior looks like there's a bit of rust floating on the paint. The operation seems to be without any particular problems. This model was said to be a Timmy clone when it was released, and I think it's good to use it as a booster. I think it's a rare effector, so thank you for your consideration. Cool Cat Transparent Overdrive effector in gold, featuring simple operation and high sound quality. - Model Name: Cool Cat Transparent Overdrive - Color: Gold - Input Terminals: 1/4 inch jack - Output Terminals: 1/4 inch jack - Power: DC 9V Thank you for viewing.