real or fake Eames Vitra (with Herman Miller label) 670 lounge chair?  

Doesn't smell (or look) quite right to me. I think it might be wise to wait for another opportunity.

That doesn't look quite right. A few more pictures might help, particularly the number of layers of plywood and some of the screws/snaps underneath the cushions.

Another possibility is that it's a frankenchair. Perhaps the bases were sourced internationally for domestic shells, but I doubt those shells are 40 years old (didn't they only use Rosewood back then?).

Other things. That HM emblem looks small and should also refer to HM. (See Pic) The arm rests and the rest of the cushions look weird but I know they use different leather.

I've never seen a Vitra base in person so can't speak to the 'serial number.'

More pictures could put this to rest (including the back of the cushions...

Thank you for the responses.

I think I know enough

Hi,

A bit late perhaps, but I think they replaced the base. Look at the screws, they are not original. And one is Philips and the other allen. That makes it even more likely that the base is replaced.

So it doesnt have to be fake, just a base from another manufacturer.