How old is my Wagner cast iron skillet and is it good?

I just received a Wagner cast iron skillet from a friend. I was just curious as to how old it might be, and if it's good. It appears to be perfect for what I need, but I was just curious. The only markings on it is the word "Wagner" on the bottom, and across from it has the number 8. It appears to be in excellent condition with zero pitting and rust. It has 2 pour spouts and has a small rim along the botton (heat ring?) It also sits perfectly flat.