I owned it, but I rarely had the chance to use it, so it's in very good condition with no rust or signs of use. Although I'm not certain, it's likely a YAMAHA key. I can't say for sure, so there's a possibility it's different. It looks and feels like a standard tuning key. The slightly bluish areas are due to the color of the LED lights in the room, not the key itself. Instant purchase ○, price reduction ×, reserved for specific buyer ×, holding for later purchase ×.