Vintage Emil Ritterhausen Baroque Grenadilla + Ivory Simple System Flute w/case

Description

Vintage Emil Ritterhausen Baroque Grenadilla Simple System Flute w/case 1800s?
Appears very vintage. I was told this likely dates from the late 1800s. it's open holed but also has some keys. The keys all function but beyond a couple basic scales and simple songs I don't know the fingerings. i'm not even a flute player but i can easily play simple melodies on it.
i am only assuming the body is grenadilla as the other flutes or this type that aren't ebony seem to be made of that or rosewood.
case is weathered but still clasps shut and protects the flute. i can add more pictures on request.
i will only ship the the lower 48 united states