From LivingPianos.

https://livingpianos.com/pianos/bluthner-grand-piano/

Blüthner is regarded as one of the finest pianos in the world. They have been hand-built in Germany since 1853 and are still owned by the original Blüthner family. Blüthner has a sound signature unlike any other piano. Most European pianos have a clear, focused, bell-like tone. While Blüthner has these qualities, there is so much more! There is a richness of overtones that is like no other piano you have heard.