Sometimes called Super Balanced, the Super Action is to some extent a  transitional instrument falling between the Balanced Action and Mark VI.  Douglas Pipher tells you more about its specificities.

"When a number of modifications were made to the Selmer saxophones in  early 1947, the American distributor decided that a new name was needed.  They came up with the name Super Action..."

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