| Specifications |
| Level |
Custom |
| Key of |
C |
| Key System |
Full Conservatoire |
| Bore Style |
American |
| Octave Keys |
Semi-automatic |
| Mechanical Features |
Left-hand F key; Fork F resonance key; 'Philadelphia D key' |
| Upper joint material |
Grenadilla |
| Lower joint material |
Grenadilla |
| Bell Material |
Grenadilla |
| Key Material |
Nickel Silver |
| Plating |
Silver |
| Tone Holes |
Undercut with conical uppercuts |
| Thumb Rest |
Fixed |
| 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; right C - D |
| Spring Type |
Blue Steel |
| Cork |
19 |
| Pads |
3 |
| Options |
King-rosewood body (YOB-841K); 3rd octave key (YOB-841T); Ebonite lined upper joint (YOB-841L) |
