| Specifications |
| System |
Conservatoire (semi-automatic octave system) |
| Bore Style |
European |
| Keys |
Auxiliary Keys |
3rd octave key, Left-hand F key, Adjustable Fork F resonance key, B resonance key, philadelphia D key |
| Trill Keys |
Low B-C#, low C-Db, C#-D#, D#-E, F#-G#, G#-A, Ab-Bb, A#-B, B-C#, left C-D, rightC-D |
| Pads |
cork and leather |
| Material |
Body |
Grenadilla |
| Keys |
Silver-plated nickel silver |
| Case |
Deluxe, multi-functional case (OBC-830II) and case cover (OBB-830II) |
| Toneholes |
Undercut with innovative uppercuts |
| Thumb-rest |
Fixed |
| Options |
King-rosewood body (YOB-831K) |
