In fact, the shape is exactly the one of the Vietnamese nose flutes findable on Ebay, but there is one big difference... They are much much well finished that the Ebay ones (not perfect at all though). They are very well sanded, more regular (symmetric!) and some details get the benefit of a better finish.
The labium is not perfect, but is cleaner that what can be found on Ebay wooden flutes.
Still the problem, though, of the position of the air entrance, really not appropriate for many western noses with hard cartilage at the bottom. I'm personally forced to put the hole under one of my nostrils only to avoid air leaks, and get an asymmetric position (not fitted to hand free playing).
Here is a (crappily played) sound sample :