I have four of these Ruger brand automatic knives new in box. These came out a few years ago and I haven't seen them anywhere since. When I called the Ruger factory they told me they were a mistake made by their contractor and were not to be sold with the spring installed. I have two with plain blade and two with partially serrated blade, but I am keeping one of these. Blade marked -'Ruger All Weather First Production Run'. $150 each shipped.