The M-180 is a tube-silver model equivalent to the current GX model. Manufactured around 1988-1995, it is still popular among old Muramatsu fans. You can enjoy a sound that combines the deep resonance unique to silver with the bright tone of nickel silver. This flute has no silver plating, so as you can see, the tube has black tarnish and the keys have rust, but the action is good, and it produces a deep sound with a good response. The pads are not original. We ask for your understanding before purchasing.