I read about this in one of the book about SBSK, but I can't remember which one...
I will try to find it.
All the best
Agreed, a very seldom seen early publication. Congratulations on adding it to your collection, and thanks for sharing with us.
All thoughts and opinions expressed are those of my own and should not be mistaken for medical and/or legal advice.
"Tomorrow hopes we have learned something from yesterday." - John Wayne