If I have researched this correctly according to the RB I have a Wagner arc manufactured between 1895 and 1915. It is worn but still sits flat. The RB does not show the top of the skillet. Mine has a circular mark on the top of the handle, possibly a molders mark. If you look very close there is another circular mark where the handle opening comes to a V, have to tilt the skillet just so to be able to see it. Probably cannot see it in the photo.