LC4 - Real or fake?  

Can anyone tell me where on the chair I should be able to locate the serial number from Cassina described in this article.

article:

http://www.aram.co.uk/blog/2012/01/is-this-an-original/

image:

http://www.aram.co.uk/blog/wp-content/uploads/2012/01/Prima-marchiatura-...

The neck/head pillow seems to be a little bit off (to wide) compared to images I have seen of the current Cassina version. Any thoughts on this?

If I am not wrong, all Cassina chairs of this kind should have a mark on the steel, including the signature of Le Courbousier. At least those on the market right now, as described on the webpage of Cassina where they say how to distinguish a fake from an original one.

Cheers,

Ernest.