Characteristics:
21 + 5 accidental treble buttons, 3 voices, 3 voices instrument with 5 automatic couplers, located behind the fingerboard, allowing 5 possible sounds :
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1 voice : concertina (single medium reed)
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2 voices : double medium reeds. (dry, swing or musette, according to voicing)
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3 voices : double medium + single low octave reed
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2 voices : Bandoneon.(single medium + single low octave reed)
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1 voice : single low reed
12 basses with 3 stops.
Rivage
