“Galant” style harpsichord.
From 1879/1880. Scharwenka was a Prussian pianist and composer. He was a well-known pianist in the late 19th century. He was also a music educator and had a music school in Berlin and, for a short while, in New York.
This is a virtuoso piano concerto in the best sense of the word, in my opinion. It was originally intended to be simply a piano fantasy.