The new and improved Corona model the C-II has been modified to achieve above standard robust performance by upgrading the soundboard and baseboard with aluminum, yet maintaining the signature Corona sound that is expected from this iconic model. It also comes with upgraded smooth treble mechanism. New features, new look, and an incredible sound - everything you expect from a professional HOHNER accordion. The C-II comes in four unique colors: Green To Gold, Red To Gold, Silver Rainbow and White Rainbow.