This is Dale of Norway's Sirdal. The most remarkable thing about this sweater is that the Norwegian braiding and buttons cost more than the yarn I used (Nature Spun sport). I actually am not sure this is my style so I don't wear it as often as the other Dale cardigan.
Becky has asked a few questions in the comments. Allegro Yarns offers Dale of Norway kits and they often have a few sweater kits for booklets that are no longer in print. Bea Ellis Knitwear offers most of the Dale books that are in print and you can see inside the booklets. The older Dale booklets that are out of print offer the most intricate colorwork designs so Ebay is the best bet for those.