This is an Umfaan knife, made by Chris Reeves in the 1990's with a 2 3/8 inch blade and an overall length of 5 1/2 inches. Not many were made and it is thus quite hard to come by. The polished side does show some signs of this use when examined closely. This is one sweet little piece but, having gotten it back now, I just don't need it. The original box and leaflet are long gone but it fits nicely in the pouch shown, which I believe is from Wenger.
The item "Chris Reeve Umfaan folding knife" is in sale since Tuesday, September 13, 2016. This item is in the category "Collectibles\Knives, Swords & Blades\Folding Knives\Modern (1970-Now)\Custom Manufactured". The seller is "cadysd" and is located in Litchfield, Minnesota. This item can be shipped to United States, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, SE, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, IL, to Mexico, to New Zealand, NO, QA, KW, BH, HR, MY, CO, CR, PA, TT, GT, HN.