CH Field Haviland Limoges China

I have large and small plate and bowl setting for four, a serving plate and bowl, and four tea cups with saucers with a milk pitcher and sugar bowl. They are in excellent condition.  The attached picture is the front and back of one of the large plates. I have been unable to find the pattern anywhere.  It was my mother's China, who has passed away.   I do not know what year it was made.