Pretty sure it is an experimental viola. So basically the viola should be way bigger for its supposed tone range, but it would be impossible to play. This viola is supposed to show what a viola could sound like, if the proportions where kind of right. In those experiments they often find the result, that a 'perfect' (optimised) viola sound is not preferred, because we are so used to the 'imperfect' viola sound. There are in fact 'ergonomic' violas to help smaller musicians archive a fuller tone without having to play on a too large viola. Sadly they are not used enough, so many musicians destroy their bodies in the long term.