This is a four-valve advanced euphonium with a non-compensating fourth valve in front of its main branch. This model is ideal for the advancing euphonium player, as the fourth valve is operated by the left hand while the first three valves are operated by the right. Intonation is superb and valves are fast and flawless. 
Key of Bb, .571" bore, rose brass leadpipe  
11" yellow brass, upright bell
3 top-action pistons + 1 side piston 
Clear lacquer finish
Large shank mouthpiece and case 
Silver-plated