Trombone superbone haut de gamme, instrument professionnel de qualité supérieure pour trompette, valve à double usage - AliExpress
La Cave à Vents | Catalogue : HOLTON Superbone
This is coming from someone who's never touched a tenor valve trombone/ superbone) Im just gonna assume this is the tuning of a superbones valves? Someone confirm plz : r/Trombone
Thomann MB-20 C- Valve Trombone short – Thomann France