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Covers the top four notes A- C of the piano.
Jankó keyboard adaptor for all acoustic pianos. Scalable to fit any piano. For a concert grand you will need 7 copies of this octave set, plus one side wall for the bottom end (separate purchase: https://www.shapeways.com/product/D8ED8NV2A/)
and the four note set to cover top A to C. (separate purchase: https://www.shapeways.com/product/X9244GP28/).
Default measurement is 164mm octave width and 150mm key depth. Please supply both measurements. Front strip can be clipped or clamped to the front board of the piano. All parts interlock both front and back.
This is an isomorphic keyboard to save you learning everything 12 times to be fluent in all keys.