I can find no cracks. There are manufacturing variations on each and #5 has what appears to be bubbling and roughness on the exterior (photo 12).#3 skillet has a nick on the top edge. The item "Vtg Griswold 3 4 5 6 7 8 Cast Iron Skillets Big Block Logo Erie USA EPU Set of 6" is in sale since Tuesday, May 31, 2016. This item is in the category "Collectibles\Kitchen & Home\Kitchenware\Cookware\Cast Iron". The seller is "emstreasures4u" and is located in Albany, California. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, PA, TT, GT, HN, JM.