YAMAHA-Oboe YOB-431M

YAMAHA-Oboe YOB-431M, Simplified Conservatoire (semi-automatic octave system), key systems: closed mechanical features: 3rd octave key, left-hand F key, fork F resonance key trill keys: C#-D#, F#-G#, Ab-Bb, A#-B, B-C#, left C-D, right C-D pads: 8 cork, 15 felt pads body material: Grenadilla insert injected ABS resin (upper joint) key materials: silver-plated nickel silver keys toneholes: ABS resin (except metal octave vents, upper joint only).