5 Iron Skillet #2 Prototype? Very stumped on what this is, it's not a regular issue Griswold skillet I could find so I'm assuming it's a prototype of some sort. This vintage skillet/griddle is perfect for cooking on both electric and gas stoves.Made from high-quality iron material, it's both durable and versatile for all your cooking needs. The skillet is in great shape and ready for use in your kitchen. The black color and unique design make it a great addition to any collection. The brand and model are recognizable to collectors and would be a great find for any vintage cookware enthusiast.