About the model Top-model in Mpingo,silver plated keys, goldplated posts. grenadill bell, 440/442Top-model in Mpingo with mpingo bell, silver plated keys, and goldplated posts, Articulated C#/G# key, 3 Silver Plated Rollers on lower joint thumb keys, Cocobolo ring upper joint and Inline Trill keys. The neck has been redesigned with Grenadilla Resonator and Projection Fin .440/442