9 Cast Iron Skillet with the rare Catalog No. It has the large block logo. The flat-bottomed skillet/griddle is made of cast iron, ensuring even heating and oven-safe cooking. This round skillet has a diameter of 11-5/8″ and a length of 16-3/8″. This original Griswold skillet is a collector’s item and a must-have for antique Griswold enthusiasts. This item is from an estate and its exact age and origin are unknown.