Three collectors plates made in USA.

These plates were is a box I got at an auction many years ago, I am downsizing my collection to make room for china left to me by my mother-in-law. These plate are ironstone and made in New York by Enco National they are marked Fine American Ironstone. One is from Stonefield, Cassville, Wis., and the other two are from New Mexico. They do have one small chip each and the pictures are signed. I have know way of knowing the age only that I bought them back in 1979, at an estate sale of a very old couple.