I have decided to renew the discussion related to the Knoll Parallel Bar Arm Chair 55 that can be found here:
http://www.designaddict.com/design_addict/forums/index.cfm/fuseaction/thread_show_one/thread_id/14454/
I just purchased the chair from the lady who initiated the former post. Moreover, upon further investigation I have uncovered that the chair in question was exclusively re-introduced for Lincoln. Specifically, as the tag states, they introduced just 50 of them.
Lastly, Knoll has confirmed this occurrence.
Blessings
Email correspondence from Knoll
HI.. we did a job in 2001 for Lincoln - 50 pieces of the Parallel bar-Florence Knoll original design, each piece numbered. This was a limited special order. Yes you can be sure this is the real deal.
Have a nice day.
Carol
Carol
Design Within Reach
KnollStudio/Knoll Space
Knoll Inc.
Tel 215 679-1404
Fax 215 679-1385
cconnell@knoll.com
www.knoll.com
Coooper-Hewitt 2011 National Design Award Recipient 
<img class="wpforo-defau
Photographs
The photographs as you remember were images derived from the seller.
However, for the purpose of this discussion I have included a close up of the metal tag.
I hope that this inclusion to the "WWW" will further assist others who may stumble upon this unique and "obscure" chair.
If you need any help, please contact us at – info@designaddict.com