【Ruthenium Plating】Tilz McWilliam Horn Mouthpiece 2W

This is a Mac 2W with a ruthenium plating that was custom-ordered and applied. I believe this plating is very expensive nowadays.
It has a dark, blackish hue. It feels like it fits snugly on the lips.
Macwilliam
American Shank

Thank you for looking.
Listed on Mercari.