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Al Cass was a mouthpiece consultant, manufacturer of brass mouthpieces for trumpeter Jazz musician, creator of bebop John Birks Dizzy Gillespie and many other legends from the Big Band era.
His clientele reads like a "who's who" of trumpeters, most notably from the jazz generation Louis Armstrong, Roy Eldridge, Harry Sweets Edison, Booker Little, Blue Mitchell, Buck Clayton and Doc Cheatham.
He was the manufacturer/creator of Al Cass "FAST" valve/slide/key oil combination for Brass instruments, which has been considered the industry standard since inception. It was developed after 18 months of R&D at the request and final approval of Dizzy Gillespie*
*This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "AL Cass".