2 D#/C#" frames for button 1, and 2 G#/A# frames for button 1'

Allows for example to add alterations on a 2915, or an old Sol Do model without alterations (certain old Castagnari and Saltarelle ).

This operation requires practice to be carried out correctly. We recommend having this carried out by an experienced accordion tuner. During installation, it may be necessary to modify the bed base depending on the size of these slats. It will also be necessary to add suitable skins, then tune the blades to the pitch of the instrument and tune the high voice to achieve a brilliance comparable to that of the accordion.

Chassis dimensions: D#/C#: 44mm*16mm, G#/A#: 41mm*16mm