This enamel frame has 2 patent dates on the back, 1917 and 1918.  The photo is of a dough boy soldier from that war.  He is one of the men my great uncle served with.  The frame measures 3" by 2".  It is in excellent condition.  There are no cracks or chips to the enamel. There is a piece of plastic covering the photo.  The last picture shows it with other enamel frames I am listing.