Unfortunately if it's not stamped with a name and grind # your pretty much out of luck. IE: Comp cams 268XE.

you can do as previously suggested and measure it. That will give you the measured mechanical properties but won't neccesarily tell you everything you need to know IE: how steep the ramps are, what type of spring pressure is needed, and what's it's intended use was. Lot's of variables. Sorry wish there was a better answer, if there is I'm all ears

Tim