Complete set for standard 21-bar models with chord designation printed on each button. Buttons are (more or less) oval, chord name is printed on the top. Chords included are Ab, A, Bb, C, D, Eb, F, G major; A7, Bb7, B7, C7, D7, E7, F7, G7; Am, Cm, Dm, Em, Gm. Tab on the bottom of the button fits in slotted top edge of chord bar. NOTE: E, Bm, F#m are not included in the set. They are available separately. (These 3 chords are on the Americana Model.) No other pre-printed buttons are available in this style.