||Short long joint with extra piece between it and bell (Gentleman's model).
Low Bb and B keys above low C key instead of normal position.
Low C# playable either with normal key or with low Eb key (two holes).
Cuciureanu system low C and D for right thumb (added later).
Low E key closes low F key with linkage.
Linkage for Ab-Bb trill without extra key.
Thumb Ab key raised up for easier access (added later).
Automatic whisper key lock on key itself.
Larger than normal C# key.
Extra hole and ring for first finger of right hand to play high Ab and
A with F key (also for several trills).
High A and C keys close whisper key.
High A key linked to C# key.
High F key.
High E key between I and II.
High Eb/E-F# triller between II and III.
D-Eb triller for first finger of right hand.
C-Db triller between right hand I and II.
Rollers: low C and D, Low C# and Eb, thumb Bb and F# (but not low E), F
and Ab, little finger F#, C# (but not whisper key).
Finger hole tubes extending into the bore.
Solid silver keys (very heavy) except for added Cuciureanu keys and
raised thumb Ab.
Mechanism for end pin on boot cup.