Someone (don’t know who) donated this longworth chuck. I tested it and it appears to be functional. It’s good for working on the bottom of bowls. I put it in the third draw of one of the Jet rolling cabinets. Instructions are in the box.
If you make something with this, please take a picture with the chuck in action and send it my way. I will forward the images to the person who donated this and a lifetime collection of lathing equipment and wood.