I don't have an illustration brother, but it appears that the straight ribband edge weld (red) is between crolle rods (with the wavy 'zipper' crolle rod to rod weld in blue) so the ribband was a Twist rod in between 2 Crolle (twisted) rods, rolled under heat and high pressure, then wrapped around a mandrel and the edges hammer welded (either by hand or mechanically)

[Linked Image from photos.smugmug.com]

Or maybe not frown It may have been Crolle - Twist - Crolle - Crolle rods

Spatial orientation was never my strong suite. Steve Culver would figure it out.

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