Is this Eames Soft Pad Lounge Chair Authentic?  

Yes.

i think so too.

Looks original, a great way to tell is to have a look under the lip at the top of the back rest. Under there you should find a label with the Eames logo and production date!

sorry,
looks like a knock off.
wrong screws ( allen screws ), base, glider, arms and leather.

I passed on a lower back version extremely similar to this example a little while back. With so many lookalikes in the marketplace, I insist upon irrefutable proof of authenticity for this chair style. I'd stick with a vintage one that has the logo/symbol molded right into the frame if I were you.

It's a fake! Recognisable on the wat they black steel of the base is connected to the seat.