Say you have multiple copies of brand / model that are not obviously distinguishable - how are folks tracking who's who ?

I'm not thinking of stamping the tang or carving the scales or other destructive method- but even if you have them in labelled boxes if you get out 2 or more at once- then some distraction - and then the old OCD spectrum puts you in a tailspin...

There's got to be something better than a piece of tape on the scale. If you don't care to track where you got them, when honed, etc, I guess its not an issue.