Sopralto Braithophone - an instrument combining soprano and alto saxophones into one horn. Invented by musician George Braith. Apparently this is a fairly new instrument. This connects to the Braithophone Center which features a short audio clip.
Blakey assumed an aggressive swing style of contemporaries Chick Webb, Sid Catlett & Ray Bauduc early in his career, and is known, alongside Kenny Clarke and Max Roach as one of the inventors of the modern bebop style of drumming.