This is a harmonica made by YAMAHA. Tremolo (double-reed) type / 23 holes / Made in Japan. [Condition and Operation] * I have confirmed that it produces sound when blown. * It is a 23-hole type. * I have not been able to determine the key (C major, A major, etc.). * I have not performed a detailed check of all the scales. * The body shows signs of use, such as dullness and minor scratches. * There are no accessories such as a box. * Please check the condition in the photos. This is a used harmonica suitable for practical use. Please purchase only if you understand that the key is unknown and it is being sold as-is.