This Frankoma Art Pottery # 55 Black Footed Vase is a very nice find to add to your collection! It is in the Prairie Green glaze and is impressed marked 55 and FRANKOMA with the oval O. This mark was used through the 1940's. I believe it is in the Ada clay, but am not positive. It is in excellent condition with no chips, cracks, or repairs and is about 4 1/2" tall.