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This Concert Grand Has 97 Keys Instead of the Usual 88
Bösendorfer's 290 Imperial extends the piano down into extra bass notes, giving it a full eight-octave keyboard. The enormous black case, extra keys and hand-built craft make it both a musical instrument and a spectacular object. Source: https://www.boesendorfer.com/en/pianos/pianos/Concert-Grand-290-Imperial Where Vienna, Austria Source checked the link still resolves 19 Sep 2026No one has confirmed this yet.
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