The classical 00-18c was introduced as a nylon-stringed counterpart to the 00-18 amid the folk music explosion of the early ’60s. Just like the 00-18, this guitar featured Mahogany back and sides. The 00-18c also used a longer slope to its shoulders similar to the shape of the normal 00-18 from before 1934. Brazilian rosewood fretboard and bridge, solid spruce top and solid mahogany back and sides. OMFG its so sweet! With case.