Luckily I'm currently about 20 miles away from my razors or I'd be looking, but I know I've seen them too. At least a few times.

But I've seen a huge variety of stuff scrawled into the scales. Names, dates, initials... Even instructions like 'do not use'.

About the only thing I'd personally be comfortably certain about is that it's a system of some kind for some class of collector, whether someone who's using them, trading them or just keeping them.

It's worth noting that cultural notions of when and where it was appropriate to put your name have varied wildly through time and place. When Yellowstone national park first opened in America, park visitors regularly scrawled their names and *addresses* into rock formations and trees. It took a concerted effort on the part of park rangers to get folks to stop.