The machine is an antique from the late 1800’s, and is a Nickerson machine. It feeds wire through a straightener, then through a set of dies that measure and feed it to a cutter where it then goes to the die and the links are formed and threaded. The finished chain is then fed down through the center of the machine and on to a coiler. The picture below is of a similar machine, just the die mandrel and forming jaws are changed depending on the shape as long as the wire diameter is the same, else the feed dies need changed as well. I hope that sort of answers your question. I have 4 machines total the others are tooled for cable chain and the other is of course the crinkle machine that is a form of fancy cable chain.