Correct me if I'm wrong, but I think this one is called Inverted round. It was really fun to make. Took me a while though. 18g 3/16"
You're right about the name. I've had that reaction too, it's fun to make but time consuming. Can you post a photo of how you ended it with the clasps? I don't really like how it comes out when I do it, so I'm curious to how you finished it.