Piano crossed with a harp

This is only one of two remaining harp-pianos, the bastard hybrid of a harp and a piano:


An extraordinarily rare harp-piano by Dietz, Austria or Germany, ca. 1840. The strings are plucked as on a harp, operated through a piano keyboard.

Rare harp-piano by Dietz, Austria or Germany, ca. 1840

(Thanks, Steve!)