Hopefully by this time next week I will own an original onsigned long rifle, that I have been after for two years. Is there an index of patch box shapes, lock plate shapes and inlays, maybe even engraving styles that help to place a gun's maker and maybe even ID the maker. Sort of like a key used to identify trees by bark, shape and leaves. I realize that long rifles are not that able to be pigeon holed, but at least as for style and period.