This is a beautiful old unmarked large chamber soprano mouthpiece, and it is a very fine player. The tip is .047 and it plays with a gorgeous sound. It is virtually pristine and the chamber is just a little smaller than a lot of old large chamber pieces. I have no idea who made it but I am looking into it, as I’ve seen this design before. In the sample audio, I am playing my Couf Superba 1 soprano and I am using Marca # 3 1/2 reeds. Beautiful sound, centered intonation. This one is a joy to play.