About This Items
Piccolo trumpet mouthpiece AR Resonance PL 42 7 GP.
This is from the previous generation, where the engravings are blocks instead of streamlines.
The underside is a trumpet shank.
Nowadays there are three types of backboas, but back when there were 10 types of backboas, he was number 7.
The current L should be equivalent to his number 10, so the backbore is slightly more open than the current Medium.
Throat size is 42.
Compatible with AR Resonance as well as Warburton and Parke thread cutting.