It laid the foundation for the modern saxophone, established itself in  the American market and was adopted by jazz giants such as Coleman  Hawkins and Paul Desmond... Discover the history of the Balanced Action. 

"In April of nineteen thirty five, Henri SELMER Paris introduced a new  line of instruments. A line that essentially is realized as the birth of the modern saxophone.  The instrument that changed everything. I could go on and on and on...  Everybody watching this video probably understands and agrees."

FULL VIDEO on https://www.selmer.fr/en/beyond-the-sound/category/brand/history-notes-balanced-action