Originally Posted by Shakethetrees
There almost certainly had to be some type of die involved. The links are too perfectly round when compared to the riveted links. The edges appear to be perfectly square with the surface.
The consistent heat control and applied pressure during the welding process imply there could be a "trick" that we're overlooking.
No doubt we are missing something in the production of this type of mail. To make thousands of uniform links I would imagine that some sort of form was used to hold the wire in place after it was heated enough to bend into shape, then it had to be welded in to one piece, amazing workmanship.
Here is a 17th century theta link mail and plate shirt, you can imaging how long it took to construct something like this from start to finish.