This photo shows the neck of a Max Keilwerth-made President 51XX tenor (on top), and compares it to the Hohner President he designed while working for that company. Middle neck is for tenor 26XX. Bottom neck is for tenor 131XX.



The 51XX President was built by Max Keilwerth at the time when he was working independently—after his time at Adler & FX Hüller, and before he was employed by Hohner.