yes it must be a mistake it seems in other drawings which appear to also be by Coltrane they are drawn as you suggest, A + Ab/Bb preserving the symmetry https

yes it must be a mistake it seems in other drawings which appear to also be by Coltrane they are drawn as you suggest, A + Ab/Bb preserving the symmetry https://roelhollander.eu/en/blog-saxophone/Coltrane-Tone-Circle/ https://roelhollander.eu/en/blog-saxophone/Coltrane-Tone-Cir...