||Ivory bell ring. Whisper key locks for both thumbs,
extra wide right pinky F# key and a thumb F#-Ab/Bb trill-Ab key combination
that is all in a row and flat (trill key not elevated) with no rollers between.
Each key is square.
Mechanism just above the first tone hole on the boot which enables trill from B to C#
(bass clef 2nd line B) by covering the B hole with RH middle finger,
adding the C# key just above the hole with my RH index finger and
then trilling the RH middle finger.