I've read of a knife thrower who preferred the USAF Camillus pilot survivor knife for it's metal composition, balance and durability. I'm now trying to determine the dates of production and usage during the Vietnam era. How can I tell the dates (are they always stamped on the knives?), where on the knives (as I've now heard of a couple of possibilities), and the authenticity? I've seen pictures of 'Camillus' printed on the blade @ hilt AND, written as if in 'cursive' (with the 's' on the end trailing as if a line underneath the rest of the word)! Are they BOTH genuine Camillus productions? What is known of their Vietnam war era quality? Some of these knives are being advertised as genuine and unused for sale (with the original packaging and all) for up to $750.00! I'm just trying to 'get my head around' what I've read on this blog and what I've read and seen - AND - to discern what is true - if that's possible at all…??!? Can anyone help? How do we know what is genuine and 'otherwise' of early Camillus work? How can we ask or require verification for authenticity? Thank you very much for all of your help and consideration.