Castagnari Cortina in DG two row, 4th button start, three voice LMM with one right hand stop. This is model was produced in very small numbers in the 1990s and features carved front panels. There are 12 bass buttons with 4 stops to switch low voice and thirds. Comes with a hard case and two padded shoulder straps. There is an old Castagnari catalogue listing here
In stock now, but waiting for me to complete some reed work.