The Whyte Laydie tone ring. With a heavier rim and a shorter scalloped ring than on a Special Electric banjo. Vega used this construction well into the '70's. It is most popular among clawhammer pickers. This is an earlier type with perforations inside skirt.
Later type has shorter lip and no holes.
The Bacon tone ring is a donut shaped brass ring slightly slanted inwards. The inside edge of the ring is not supported to vibrate freely. The picture of the tone ring is fuzzy because it is behind the internal resonator wall. I'll put clearer pics someday when I remove the head to replace or change the set-up. A view through the f hole.