This staff has five lines with the middle one dashed, and it covers about an octave and a half. Between any two adjacent lines there are three elevations on which notes can be placed. Color helps distinguish these elevations, with the white notes hugging the lines and the black notes falling either on or in-between the lines. Rhythmic notation is basically proportional with dashes representing beats of time (though this is not the case in this illustration).
Website: Beyreuther 6:6 System
Earliest documentation: 1985
Source: Directory of Music Notation Proposals, section/page: 10/5, 11/2, 13/10
Similar Notations: Untitled by Johannes Beyreuther