A Diminished :: A C E♭

B
F♯
D
A
A
♭3
♭5
A
♭3
♭5
♭3
♭5
A
♭5
A
♭3
⬤ ⬤
A
⬤ ⬤
C Dominant 7th :: C E G B♭

B
F♯
D
A
C
5
♭7
3
C
♭7
3
5
C
3
5
♭7
3
C
5
♭7
⬤ ⬤
⬤ ⬤