Omnitonic horn

Technical description: Brass; angle between axis of mouthpipe / crook receiver and axis of bell 146°; lightweight construction; single gusset in bell, no garland. Omnitonic system: fixed mouthpipe and built-in tubing mounted in place of distal arm of m.t.s. for standard nine crooks - B♭ alto, A, G, F, E, E♭, D, C and B♭ basso. Graduated plunger on Stölzel valve principle to select desired tonality. Total travel 122mm. The loops are added incrementally, i.e. for B♭ basso, the windway passes through all eight loops. The plunger has eight straight-through passages plus lowermost passage turning windway from side entry to casing of plunger which continues into the bell-pipe. Repair History: Many old patch repairs.