Key of D/G. Stepped keyboard with 21 treble buttons, 2 reeds per treble note, 8 basses with stop to remove thirds. Swing tuning and tonic on 4th button of each row (see note chart). Adjustable bass strap. Natural finish cherry. With case and straps. Video.
The treble note layout, often referred to as the "Anahata" layout, extends the g-scale down below middle C.