Morgan alto saxophone mouthpiece. I found the case, so I added photos. On the front, there's a circular leaf illustration etched with something like a stylus. In the center, it's engraved with "MORGAN." On the bottom of the back, it's stamped with "15788." Below that, vertically, it's stamped with "6M." It looks like a doodle, as it's freehand. - Type: Alto saxophone mouthpiece - Material: Ebonite - Color: Dark brown due to aging. Originally black. Purchased new 20 to 30 years ago. Thank you for looking.