Hi,Pictures always help, but I would venture to guess it could be a Frank Wells since Eddie was a Chicago guy. He based those mouthpieces on a LeLandais model (can't remember the name). I had one of those that was probably one of the loudest and brightest hard rubber pieces I've ever had. It was like a well-made Berg Larsen.
Hi doctor sax,
Eddie Harris and a business partner (or partners) formed the A.G.E. Company to make the mouthpieces. Eddie is the "E" of A.G.E.
I am not sure if they got the mouthpiece blanks from another company or what.
They made the saxophone mouthpieces:
plus the more esoteric mouthpieces such as the Reed Trumpet mouthpieces: