A cast-iron skillet builds up a naturally nonstick seasoning ... to mid-20th century by now-defunct companies like Wagner and Griswold has skyrocketed. Now that more people are seeking out these ...

There's good news—there are tons of resources online to help with your cast iron collecting quest. Trying to figure out the age of your old Griswold skillet? Try a book. Yes, old-fashioned books ...