This is a brand new, unopened Yamaha trumpet mouthpiece, model 16C4, with gold plating. It was included with the limited edition XENO 25th Anniversary model, of which only 200 were made worldwide. According to the documentation at the time, Mr. Fusasaka, who supervised the model, specifically requested the gold plating for the mouthpiece. Yamaha does not offer gold-plated mouthpieces in their standard lineup, making this one of only 200 in the world. Please note that the original box is not included. The mouthpiece will be carefully wrapped in bubble wrap for shipping. This is a valuable piece, so don't miss this opportunity if you're looking for one.