It has that mid-century modern look to it (popular now-adays), but I see it being weak in the 45 deg angle joints on the bottom and in the smaller areas od the big dowel pins where they go through the frame.
Even if it was beech it might still be close to failure at those points with a heavy person sitting in it, or someone sitting down heavily.
Are you thinking of building it, because is sure is a beautiful design.
maybe the metal banding is a stainless frame of some sort with wood on each side?
I'd plug this chair, as a one off, at $4,500 list in a desgin center frequented by interior designers in a big city such as LA or New York
as long as the leather was top quailty. (there is a type/grain/weight of leahter they use for the MCM stuff)
In your home it sure would be an eye catcher.