This is the Atelier Momo 47JW⭐︎ mouthpiece for tenor trombone. I purchased it new about 10 years ago and used it for a while. I think it was about 5 years, at a rate of 3 times a month. The plating on the shank shows some deterioration, but the rim and cup are clean because I stored it in a pouch after playing and cleaned it regularly, taking good care of it. I will also include a UMI pouch, although it is slightly torn.