I thought this would be a good place for people to show off their " demo" knives and to explore the different manufacturers and dates. A link i'll post below says Stevens, Kingston, Ulster, Imperial, Western, Case, Queen and Camillus made versions of this knife. I've only seen Camillus myself. So to start off here are my two.. US branded Camillus dated 1969 and a 1994 Camillus USMC label. (Image removed from quote.)(Image removed from quote.)The 1969 is a real nail breaker. The 1994 opens fairly easily. Both are about the same weight and build quality. The 1969 bottle opener has a small bolster to help in opening. Not much help as it too is hard to open.Now to find ones labeled USAF and USN. oh and here is that link for more info...it's been posted here on MTO before.http://www.donrearic.com/demoknife1.html