This is one cool knife. Kershaw Rotary Lock Folder. Model 2105. These were introduced in the 1970's. Don't see many around these days. Single locking blade. Has rotary mechanism to rotate the blade. Kershaw Oregon USA on tang stamp. By Kai Japan 2105 on back of blade. 3 1/4" long when closed. Rosewood inserts in the handle. Quality built knife. Has been in storage since 1985. Buyer to pay shipping and insurance if desired. Money order or cashiers check only.