Vintage red and white Homer Laughlin Currier and Ives china - this is a set of four Hudson River pattern plates, 6 3/8" in diameter.
All of these are shabby, stained to the edges as shown. We haven't tried anything more than a wipe with a gentle dish soap, as we're not sure of the best way to try to clean them up any further.
We love this pattern, and think these make nice wall hangers even as they are. And they might be well worth cleaning as they have no chips or cracks.