An accordion, particularly a diatonic button accordion, comprising a treble casing, a bass casing, and a bellows arranged therebetween, wherein buttons for playing the accordion are arranged on both the treble casing and the bass casing, said buttons being connected with a respective pallet via a mechanism of levers, said pallet closing an opening in the bottom of a reed block comprising reed plates, wherein it comprises an assembly comprising a bottom formed of superimposed panels with openings, and reed blocks that are arranged on this bottom parallel to each other, wherein all reed blocks share a common bottom.
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