I cleaned this skillet up (along with a smaller skillet and a dutch oven) for friends of ours. I f my research is correct, I believe it to be a Chicago Hardware Foundry piece perhaps dating back to the 1920's. Is that correct? Anyone know? It measures about 10-1/2 inches across top and 9 inches across bottom. Has a heat ring. It cleaned up very nice and I'm tempted to use it a few times before handing it back.