Thanks, I got it. It just didn't look like the sprocket was or is as countersunk as the Ironman or Supersprox. But I would be mistaken, at least for the Supersprox as here is a picture of it before I mounted it up on the bike.
I can't tell by this picture of the Ironman, but it looks pretty similar.
I can't tell by this picture of the Ironman, but it looks pretty similar.