vintage USA pottery dinnerware set for 4, green ivy border dishes

Ivy green on white, vintage American made pottery dishes for four. This has a old Mount Clemens mark, we think?

There are four each of 10 1/4" dinner plates (one badly discolored and stained), 7 1/4" salad plates (all good), 7 1/4" diameter soup bowls (one with a badly darkened spider hairline), and cups and saucers (all good). There's also a set of matching salt and pepper shakers.