DescriptionMIM Janko Piano.jpg English: Piano with Jankó keyboard at the MIM, Berlin. Date 18 March 2010 Source Own work Author Morn the Gorn...
DescriptionMIM Janko Piano 2.jpg Carl Heinke, Berlin Piano with Janko keyboard at the Berlin Musical Instrument Museum Date 20 July 2008, 15:35:22 Source...
