vintage (?) peace sign necklace

I don't really know how 'vintage' it is, just that I've probably had it for ~20yrs, maybe more, and that I'm pretty sure it came to me from a junk store somewhere along the line. Nothing special in any way I'm aware of, its 2" across on a chain a little over 2' long total, all made of "silvertone" metal. The plating is flaked a little on its front, the whole back is textured like the ring on the frontside. The chain is magnetic, the pendant is not.