Euphonium.

Technical description: Brass, no gusset in bell, French bell rim. Looped 4th valve tuning-slide. 1st, 2nd, 3rd valves for R1, R2, R3 in ergonomic V positioning; 4th valve for any left hand finger. The 1st valve tuning-slide outer apparently made too short, moveable collars length 15.9 fit onto each inner slide and limit insertion of the tuning-slide which would otherwise collide with the 4th valve bottom cap. Large bow with three contiguous bow guards, the larger central guard with a flange and a knob; bow guards on the four valve tuning-slides. No water-key. Fitting for music-card holder.; Nominal pitch: 8-ft C.; Type or system: 4 valves.; ; ; ; Usable pitch: Probably built for use at A?=|452.4|Hz.;