Counting 'Scrolls' to determine 2 Iron, 3 Iron, etc. is discussed here
http://docs.google.com/View?docid=dfg2hmx7_0dgmfqfgm but this might help.
The 'lopin' or 'billet' starts with alternating layers of thin strips of iron and steel (the
leaves)
which is rolled/hammer forged then twisted into the
rod (the
scroll), then the rods are hammer forged/rolled to form the
ribband, then the ribband is wound around a mandrel and the edges are 'jumped' (over-lapped) and helically welded (whew!)
It's alot clearer here
http://docs.google.com/View?docid=dfg2hmx7_180c83rvwg4 
It will help if you can zoom the images. I've got some ultra high resolution pics coming which I'll be working on. The PictureTrail Photo Editor doesn't have the ability to draw arrows or put labels on the image though
