This is a Florida vintage Super Tone Master mouthpiece for alto saxophone, serial number M86. It was refaced to .071 by mouthpiece tech Marin Spivack and is now equivalent a large 5* or small 6. The inside of the mouthpiece features a medium open chamber with rounded side walls. There is also a roll to the baffle below the tip area. The rails, table and tip are all in excellent shape showing no notable wear. This mouthpiece plays with a warm sound and carries a nice amount of projection due to the baffle roll.