Here's an extremely rare saxophone mouthpiece. This is a Zimberoff Super Sonic "House of Note" hard rubber alto sax mouthpiece serial number A440.
This mouthpiece was made as a collaboration between Bobby Dukoff and Sam Zimberoff. It has a fairly open chamber with a medium facing. It blow a lot like a vintage New York Meyer Bros alto sax mouthpiece. It made of excellent quality hard rubber. The facing measures an honest original 0.080.