I have a few of questions to ask. I have some of my late father-in-law's Camillus knives . Among them are the following:1. Camillus "fighting knife" ( 7" blade, 12" oal, stacked leather handle, black sheath ,parkerised blade, reads "U.S. Camillus N.Y." on the blade below the guard), 2. Camillus M4 Bayonet (6 3/4" blade, 11 5/8" oal, stacked leather handle, parkerised blade, reads "U.S. M4 Camillus" on the guard, no sheath) and 3. Camillus Pilot's Knife (5" blade, 9 3/8" oal, reads "Camillus N.Y. 2-1972" on the pommel, leather sheath with "Pike" stone, non-parkerised blade). My father-in-law worked for Camillus during the late sixties and early seventies so I know that these knives date from that time (he was an engineer and I believe he left Camillus in the spring of 1973) but it seems to me that, except for the Pilot's knife, there is no way to prove how old these knives are. I see them on ebay variously described as "WWII" or "Vietnam era". How does one tell for sure? As for the Pilot's knife, it has a highly polished blade. I don't think my late father-in-law would have bothered to polish any of his Camillus knives (he had dozens) so I'm wondering if this was prototype knife, a production model (I haven't seen any others on ebay) or just a mistake? Finally, I have read that the military spec for the "fighting knife" is that it has an anti-rotting coating on the handle. Is this true for the bayonet as well? All the Camillus military knives that my father-in-law had in his collection have natural leather handles (not black) . None of them were ever used (they were found in a filing cabinet next to his desk at his home in Syracuse) so the coating could not have been "worn off". Were some issued without the coating, or did he pull them off the line before they were finished? (I think he was in design or quality control) Any ideas? Thankyou for your help.