Who made this beautiful chair?  

I think I can speak for quite a few of us when I say that I wish you could tell us:
http://www.designaddict.com/forum/General-discussion/Perplexing-Danish-sofa

Oh! The plot thickens. Any cross-referencable information? Marks or remnants of marks?

I wouldn't tell me where you saw this chair or I may buy it out from under you LOL 😉  Yes, the people on the site have been searching for info on the same sofa for a while. One of the members recently discovered that a chair in that style was also made.  Ever since I have been on the prowl for one.  So if you see any type of indicators as to who designed it, please let us know.  This new post has just ramped up my curiousity.

BTW, really like the fabric combinations on that chair.