Hello, Gnarly.
Thanks for the Wikipedia article & list
of chord substitutions. I'll go to my
keyboard tomorrow.
The sounding of the chords is weak in
the article, to my hearing-impaired ears.
When reading the title of your post, I
incorrectly assumed that it was a list
of factory-installed chord substitutions
for a 48-chord harmonica.
In his instruction method "Chromatic
Harmonica" (1972), Warner Bros.
publications, Tommy Morgan lists
chord subs available, factory-
installed, on the 48 chord harps.
Al Smith's self-published 48-chord
harmonica methods also list factory-
installed chord substitutions:
Chugger's Manual (1980)
Chugger Lingo (1987)
Little Chugger for Chordet 20 (1988)
Chord Solos (1989)
The Al Smith instruction manuals are
difficult to find today, but the year 2021
email source is:
jimdyer@charter.net
Best Regards, Stay Healthy
JB