US. 73,753. H. W. Poole. Key-board for Organs &c. 28.01.1868 Fig.2 Perspective view showing the relative position of all the Keys.
Jankó-Klaviatur Public domain photograph of architectural diagram, building plan, section, free to use, no copyright restrictions image - Picryl description
shows scale c major Public domain photograph related to music, performing arts, free to use, no copyright restrictions image - Picryl description
Keyboard with all conventional tone names. note: H = B in some languages, and therefore B (german) is B-flat (english) graphics: Ziga 08:29, 10 December 2006 (UTC)