- left thumb rest
- left thumb rest
- left thumb rest
- left thumb rest double octave keys
- left thumb rest guard
- left thumb rest left plam keys
- left thumb rest low a lever
- left thumb rest octave and low a levers
- left thumb rest octave key
- left thumb rest octave key
- left thumb rest octave key
- left thumb rest octave key and mechanism
- left thumb rest octave key with neck in socket
- left thumb rest octave lever