Notes: C, Db, D#, E, F#, G#, and Bb - Key: C - Category: Octatonic Scales
The C Diminished Whole-tone II uses eight notes per octave. Because of this same reason it is a member of the so called Octatonic -scales that have Eight-note (or Eight-tone). On the piano keyboard, it is made up of five black keys: Db, D#, F#, G#, and Bb and two white keys: C, and E. This combination makes this scale - as well as the C Prometheus, C Prometheus Liszt, and C Prometheus Neapolitan - as great choices for composing or improvising music.
If we take a look a the key signature of the C Diminished Whole-tone II Scale we can find it has two flats and three sharps. Therefore, on sheet music you will find five accidentals on the score. The notes of this scale are: C, Db, D#, E, F#, G#, and Bb.