Weltmeister Rubin accordion, with 30 keys on the treble side and 60 bass. Normally an instrument of this weight (6kg!!) and size will only give you 26 keys and 48 bass. This has two voices – as demoed in the video below. If you want a light and compact piano accordion this is ideal. Comes with a hard case.
[youtube=https://youtu.be/7lar2DgQCuQ&w=320&h=240]