This is a domestic acoustic guitar from Darco, a string brand famous for its association with Martin. It's valuable just for being a Darco guitar, but it's also made in Japan. The shape is a popular Gibson J-45 style round shoulder. The top is spruce, and the sides and back appear to be mahogany-type materials. Beautiful materials are used. The build quality is also meticulous, and the sound is good. It was made by Kato Gakki Seisakusho at the time. The string height is easy to play, about 2.5mm on the 6th string and 2mm on the 1st string at the 12th fret. Type: Flat top