Porn industry execs?

He looks thin and neat. Just sayin.

I agree it looks stamped but look very closely at the uniformity of the rings. It wasn’t just hand chased into the metal. I also agree a tool was used to stamp it. But I’d say the tool end was spun and scored to make them concentric and evenly spaced. That’s why I suggested a lathe or some sort of spinning process. If you haven’t already, download the full images. They are quite sharp and you’ll see what I mean about the precision.

Looking very closely at it, what impresses me the most is the precision of the concentric circles. It looks like they must have used a tool that was spun on a lathe it’s so precise.