Welcome to SRP. I have a small collection of Case knives as well. Mostly 61048 & 62048, from tested up into the USAs, plus some odds and ends, a XX stag canoe, and stag USA trapper, bone XX toenail. Unfortunately Case didn't date their razors. They did change stampings to some extent. There are Case Bros Little Valley, Springville, Kane, PA, and the WR Case & Sons Bradford. The latter being the most common. They made real good razors, just as they did pocket knives.