certain Radiomir's - and not many of them. To the best of my knowledge, it is available in available in both steel and gold, but not PVD. I think this one was designed as a way to integrate the look of the curved wire lugs into the clasp.
It's been a long time since I've seen one of those and didn't realize they were still being made. The clasp you pictured, along with the "regular" one that I assume you've seen, are the only two styles I'm aware of.
I hope this helps...