Issued in 1960 and naming Hans A. Bruder as the inventor, this is another unique variation on the harmonica theme which seems never to have been commercially produced. The player blows into a small mouthpiece (8 in the above diagram) and selects the notes he or she wants to sound by pushing the buttons at the right end of the instrument. These eight buttons are connected to eight slides that direct the air to various reeds:
The instrument boasts a range of three chromatic octaves, capable of both single notes and chords, but one look at the complicated mechanics and somewhat unusual fingering system and it is perhaps no surprise that this never went very far beyond the drawing board.
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