This "Camillus Dog Leg Jack" (?) has me stumped. I've never seen this pattern before with a Camillus tang stamp. I've never seen this knife in any of the Camilllus catalogs I have access to and have never seen even a picture of it anywhere. According to my handy-dandy China made plastic calipers the knife is about 1/32" shy of being 3" closed. The tang stamp is a long line Camillus stamp which according to generally accepted knowledge, was used 1960-1976 (although I believe it was used before and after the suggested dates) The handles are that black synthetic Camillus used from (at least) sometime in the late '40s until the mid '50s and maybe later. (They introduced Brownstag® in '56 or '57 but I have no idea if they continued to use the black synthetic on some patterns.) I have seen a knife in this pattern that had an IKC (Imperial Knife Company) tang stamp but never one with a Camillus tang stamp. To me, the knife does not look like it's been apart but I'm no expert on that. I would like to know the approximate age and more especially, the pattern number (it's not stamped on the pile side of the main blade) and if possible how many years this pattern was made. And am I correct in calling this a "Dog Leg Jack". Thank you for your time.