Ultra Edition II Knife. The V-Twin Series Knucklehead knife and walnut display case. Harley makes an Ultra Edition knife of most of its knives and has very limited quantities made. The handle is made by Yellowhorse Navajo artisans featuring turquoise and lapis along with an outline of the engine in brass. Comes with certificate of authenticity 481 of 500 made by Buck Knives Inc. for Harley-Davidson