Is it an original Harry Bertoia Diamond Chair by Knoll or....?  

Greetings to everyone!
I recently bought a Harry Bertoia Diamond Chair from a gallery and i am curious whether it is an original Knoll product or a knock off...
i know that there are some threads describing the details distinguishing an original Knoll. For example the way the wires are attached to the frame 9on top), a knoll logo in some cases or the way the lower part is attached to the upper part, however i would highly appreciate it if anyone could take a look at the attached images and share with me his/her views on whether this chair is an original Harry Bertoia Diamond Chair by Knoll. For sure, however, there is no logo.
Thank you