The seller of the exact red chair you posted a pic of (unless, of course, you were just using that photo as a "stock" photo of the chair)
http://www.designaddict.com/forum/General-discussion/new-craft-and-assoc...
The manufacturer is not Selig. Selig was the retailer and importer. It is not generally known who manufactured a lot of Selig's product, although certain items like the Z Chair can reasonably be presumed to have been produced by Chr Jensen's Møbelsnedkeri. I would NOT say that extends to this chair.
With most all of Selig's pieces, there is a certain assumption that Kofod Larsen designed them. And I tend to believe this assumption is true in a lot of cases. However Selig absolutely did import pieces by other designers. To name a few: Poul Jensen, Arne Hovmand Olsen, Knud and Erik Christensen. I am sure there are more, those just come to mind right now.
So if you want to know that Kofod Larsen is the designer, you will need to find documentation that this chair is indeed a Kofod Larsen. I wouldn't pay for it as a Kofod Larsen unless I got the documentation.
And on a final note this chair does not look a lot like a Kofod Larsen.
If you need any help, please contact us at – info@designaddict.com