This is a set of three 8" lunch plates by Imperial Glass in their Twisted Optic pattern in green. Twisted Optic was produced from 1927-1930 and is authentic Depression Glass. It is frequently confused with Anchor Hocking's Spiral pattern. The easiest way to tell the difference is to look at the direction of the spiral. Twisted Optic spirals to the left, Spiral goes to the right. All three plates are in very good condition with no chips or cracks, but there are utensil marks from use.