With nearly 30 years of experience on it, Jon Sauer is a master of the tricky-to-use rose engine lathe (which we looked at in "Production Methods: How Complicated Radiating Patterns are Engraved in Metal"). Using this machine here…
…Sauer cranks out ornamental carvings of astonishing intricacy and variety:
He's even released a book of his patterns (though it's currently out of stock) and sells smaller versions of his turnings as buttons on Etsy.
You can see more of Sauer's work here, and/or follow him on Instagram.