Bertoia Diamond chair  

Hello, 
I bought a bertoia chair to a guy who swear it was a real one but I have doubts... the thing is the guy had a lot of design furniture in his place so either is really good and they were all fake or so it happen that the only thing fake he had was this chair and that the reason he was trying to sell it...

I believe it is a fake because the chair is weirdly low... the seating is at 36cm high... which seems low to me !? does anyone know if Bertoia produce different height of chair whithin the different fabrication? 
I have to specify that it is the most common type of Bertoia Diamond and not the one with the shockmount. 

For the rest, the welding on the base or the wire seems legit and others dimension fit... only the height is weird to me? 

Thanks for the help