J.H., I am really enjoying seeing your work and your photos. Very helpful.
Regarding the pipes made by Mark Silver, I hope someone with more knowledge than I have will comment. I think the beads on Mark's pipe are punched. Same with the smaller detail that looks like a twist string. That's based on looking at the image at about 5x magnification.
It is also possible to swage in beads with a wheeled tool--some version of a little wheeled tool called a milgrain/millgrain wheel/tool. (Just found some online. It's a little wheel for making a "beaded" detail. Some of them just swage a series of fine lines, but I've also seen one that swages a beaded edge like this. They are basically a very small version of the tool used in the kitchen for "swaging" in a decorative crust on the edge of a pie.
Also, for anyone interested, there is a cool video of Youtube craftsman Uri Tuchman showing a simple setup for pattern copying when using a small lathe and graver.
As you can see, the image in the main page shows a small but complex lathe bed. But later in the video he switches to a flat bed and completely manual tool holder. His setup for the addition of the copying attachment is shown from 14:43. (That section also includes him switching to an electric motor, which may not seem relevant, but starting the video from 14:43 gives you a good look at his flat bed and tool holder, which then helps explain what he is doing afterward with the pattern copying setup.)
His tool holder is quite decorative, but of course it's not necessary that a tool holder be so fancy. Note the adjustable spacer set into the bottom of the tool holder. The spacer (or whatever it should be called) then rides against the pattern.
