A buddy of mine just gave me a few dozen 45-70 cases for my reloading efforts. Most of the cases seem to be of the 1950's to 1960's based on headstamps (there may be some older stuff, but most of it was all in decent shape and showed no signs of age or cracking.) However, in all the cases, there is ONE case that has NO headstamp whatsoever. The primer (center) shows usage in a Trapdoor (the FP dent is slightly off to one side.) I know there is no collector value in a single, expended cartridge, but Im wondering how old this thing is. From what I read, headstamps were omitted only on VERY old rounds (like 1870's).