xen keyboards

>Sorry for the late reply, it took some time to dig the photo up and scan=
it.
>I have uploaded it together with a photo of the 31-tone
>Harmoniehammerfl=FCgel.

Thanks for the quality scans, Manuel! Do you know the keyboard layout of
the Harmoniehammerflugel? Looks like Janko-Fokker. And what kind of
instrument is it? Looks like a piano! In any case, is this instrument
playable? Do you know if the force required to move the keys increases
towards the back rows?

Carl