New Watch Case Knife. This is a new stainless steel watch case knife. It is a well made sturdy knife that makes opening watches easy. Measures approximately 6 5/16" (160.4 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.