Help me with my Bird Chair  

Hi
Aside from poor contemporary reproductions, Knoll was the only company to produce the Bertoia Bird chair.

Great. So is there a way to...
Great. So is there a way to tell if mine is a poor quality reproduction? Everything seems to point to my chair being a Knoll chair, but how can I prove that without a label?
Cheers,
Andrew

Knoll, no question
Looks like a fairly recent production as well.
There may be "Knoll" stamped in the base, but maybe not.

Yes, Knoll...
Should have "KnollStudio" etched into one of the crossbars under the seat or possibly to the lowermost part of one of the legs.

Looks like a repro to me....
Looks like a repro to me. The back rest seems to lean back too far compared with a Knoll chair.

Interesting
Apparent difference.... I still think it's authentic.

Remove the pad...
Remove the pad and check the wires. I know that a lot of the Diamond Chair reproductions have the seat wires sandwiched between 2 wire rims (or whatever you want to call them). The seat wires are also beveled and and the edges smooth where they connect to the rim - unlike copies, in which the seat wires are flat at the edges. I am assuming that the bird chair would be similar in these ways. I will say that yours appears to be a more recent model, as the vintage Bird Chairs do not have flat chrome disks on either side of the shock mount. That's what little I can contribute. Hope it helps.

Bird chair
Earlier versions had a double-edge along the two sides, but not the front edge or top.
I believe the current production has a double-edge along all sides except for the front edge.

more information
Thanks everyone. I double checked and my chair has double edges around the frame except for at the front where it is a single bar on the edge.
I also managed to find a small green label on the inside of the fabric cover on the bottom at the front where it folds around under the front of the chair.
The label says Matricola 719. It then has boxes numbered 1 to 12 and 00 to 02. Numbers 6 and 01 have a line through them, perhaps suggesting this chair was made in June 2001?
Would any of this tally with this chair being a Knoll production?
All the best,
Andrew

Yes
I believe it is Knoll and there is no clear reason to doubt that. The numbers represent the production date as you surmised. Did you check the base for a Knoll or K stamp (I'm not sure exactly when they started doing this)?

It is Knoll
You can't really see the angle of the back to compare it with the side shot. It looks real and the Matricola tag confirms it.
I recently bought a Womb chair which has Knoll printed in the frame just under the arm rest. It also carries the Matricola sticker with 7 and 07 punched. Maybe Knoll didn't stamp the frames back in 01 but it certainly is a genuine piece.

Many thanks
I just wanted to say a big thank you to everyone who posted in this thread. Its been really helpful.
Cheers,
Andrew

Confirmation from Knoll
I thought I would just update anyone who was following this thread with news from Knoll.
Francesca from the UK office just emailed me to confirm that Knoll didn't start to stamp their name in to the frames of these chairs until 2003. As such my 2001 model wouldn't have had any stamp. Her view was that my chair is indeed a genuine Knoll production.
Thanks again to everyone who got involved and I hope this postscript from Knoll helps anyone who needs to establish authenticity for this kind of chair.
Best,
Andrew

Is the chair still available for sale
I have been looking for a vintage bird chair and happened to see the forum. Is this chair still available for sale? Thanks.