Chordometer

The CHORDOMETER
by Don. Ciccone

Created by hit recording artist Don Ciccone and designed in the form of a circular keyboard, this practical tool is the quintessential device for chords, scales, note-names and key signatures that's sure to become a collector's item.
Fits easily into a page protector, loose-leaf binder or book, yet is presentable enough to display in the home.