The invention relates to a display area for displaying characters such as Letters, numbers or symbols with a transparent glass pane, the opaque coating is provided on its reverse side with a, the locations in the form of the characters has exhibit coating comprises displaying said character, wherein the front surface of the transparent screen a coating, in the form of the characters is partially permeable to light and exhibit coating locations which align has, wherein the coating-free locations of the front surface with which the back surface, and that at the points, at which a sign is to be visible only after [...] the back of the disk, the runs continuously without exhibit part-translucent coating the front surface location.