This is a Giardinelli New York flugelhorn mouthpiece. I purchased it used from a musical instrument store 6 years ago. The details are unknown, but it has the E.J.V. stamp, so I assume it was ordered by someone. As a guess, the rim size is about 16mm inner diameter, which is probably equivalent to a Giardinelli 10. The cup is a V cup. I used it because it was easy to switch to from my Giardinelli 10VS, which I mainly used for trumpet. It's old, and as you can see, it has scratches, damage, and dullness, but the sound quality is, as expected, first-class. How about it?