Early Castagnari Sander DG 3 voice MMM, 21 button treble 12 bass. Antonelli tipo a mano reeds. Third button start with standard low notes. It has a stepped keyboard with traditional wooden action. There is one stop on the treble end to control the third M reed. No bass stops. It is only on the market because of the owners poor health. Hard case and straps are included.
In my workshop awaiting service.