I have an old Wagner Ware cast iron skillet (marked as model 1056T; measures about 7 inches inside bottom). This was given to me by my grandmother.
Where the handle meets the pan, you can see a marked difference in material. It looks like the pan used to have some sort of coating that has now come off.
I have another one (bought at a thrift shop) that has no markings except "No. 10 12 7/16" on the bottom. It also looks like it had a black coating and a more silver color is showing through on the round ridge on the bottom outside and on the rim edge of the pan.
I keep these seasoned, but neither behaves as well as the Lodge pan I bought new a few years ago.
So I'm wondering if they originally would have had some sort of coating. I thought not, but they just look so odd.