33 treble buttons, 3 voices instrument with 2 automatic couplers that can be activated while playing, located on the grille allowing 4 different sounds.
- 1 voice : concertina (single medium reed)
- 2 voices : double medium reeds. (dry, swing or musette, according to voicing)
- 3 voices : double medium + single low octave reed.
- 2 voices : Bandoneon.(single medium + single low octave reed)
18 basses with 1 stop:
- 1 stop to remove the thirds from the chords.