Synthwave Horror: The Hands of Orlac
Orlacs Hände (original)
A world-famous pianist loses both hands in an accident. When new hands are grafted on, he doesn’t know they once belonged to a murderer.
Starring Conrad Veidt, Alexandra Sorina, Fritz Strassny, Paul Askonas, Carmen Cartellieri, Hans Homma, Fritz Kortner
Watch "Synthwave Horror: The Hands of Orlac" on Tubi TV released in 1924. It's a crime and mystery movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.