What is "breakthrough!"

Breakthrough! is an album by the Cedar Walton/ Hank Mobley Quintet recorded on February 22, 1972, originally released on the short-lived Cobblestone label and rereleased on the Muse label. It features performances by Hank Mobley and Cedar Walton with Charles Davis, Sam Jones and Billy Higgins and would be Mobley's final studio recording before he retired due to lung problems.