Schilke 6A4A Professional Used Item

Purchased at a musical instrument store in Tokyo.
This is a release from Mr. K, famous for the theme song of Hissatsu Shigotonin (The Accomplice).
The rim fit feels more comfortable than current models, and I used it, but I had it measured at my atelier and had an original mouthpiece made, so I rarely use this one anymore, which is why I'm selling it.