Americana series started in the days of the KN2000, went through a KN3000 series and the last disks were available in KN5000 series.

They were 5 styles per disk with 6 variations to each style, the 5th of which was an solo auto chord progression (as an exercise in the 6k book described how to create) which enabled you to solo a middle 8 with chords but without using left hand, each style 2 intros and endings, mostly 4 fills and 8 registrations.

There were 34 disks that could play on the 7k with suitable treatment and possibly a couple for GN organ from memory but they mostly duplications in content.