Chopin's Fantasie Impromptu.
In this video you can see and hear the predecessors of our "mystery" piano.
Concert Grand by Schroeder
Muhlbach Upright piano
Alexander Meybom Royalino (aka small piano)
Ronish straight strung piano
Mulbach 160cm piano
Hagspiel 170cm piano
Kindest thanks to Museum "Family of Pianos"
Tremendous variety of sound of different pianos is something we lost today completely. All pianos sound the same and there is hardly any difference in sound remaining.

In my next video you will hear the same piece performed on the same brand name piano through 150 years of history, how it sounded then and now... What we gained and what we lost...