Hohner 7565C Chromatic Meisterklasse Harmonica - Key of CHohner 7565 Meisterklasse Chromatic Harmonica Key of C. The Meisterklasse is the only 14 hole chromatic harmonica made by Hohner. This harmonica has a scale extending downward to G3, giving it the same tonal range as a violin and making it possible for the player to play classical pieces. The Meisterklasse is equipped with an anodized aluminum comb and features chrome plated brass covers for optimal sound projection. Meisterklasse C has a bright tone