Castagnari Dony DG – a prototype Dony from the late 80s or early 90s. It is a little smaller and lighter than the later Dony and only has 8 bass but has a similar two voice treble layout with 11/10/4 buttons. This one is 4th button start and is tuned with more tremolo than modern Castagnaris, which was common on these older models.
Treble note layout is:
Half row Bb/G# Eb/D F/F Bb/G#
G row Eb/F B/C D/F# G/A etc
D row E/A G/B A/C# D/E etc (push E button 1 same pitch as pull E button 4)