My mother recently gave me a small skillet and a griddle that had belonged to her maternal grandmother. She found them in in storage in our old dairy barn. I have no idea how long they were there, but it was most likely 30 years or so.
Here are a few before pictures of the skillet:
and the griddle:
I washed them as best as I could with detergent and then washed them with Coke a few times. I put them in my gas grill at full blast (around 700 degrees) and burned all of the old seasoning off of them and washed them some more with some of the Camp Chef cast iron cleaner. I also used a flexible putty knife to get off stubborn little bits of the old seasoning. I coated them with the Camp Chef conditioner and seasoned them. The griddle has received a second seasoning with Crisco.
I don't know who manufactured them. The "3A" mark on the skillet is the only mark on either of them.
This square skillet was my maternal grandmothers and is the skillet in which she always made cornbread for me. It was unused for many until my mother gave it to me. The seasoning was beginning to flake off, and it was beginning to rust. I decided that it needed to be cleaned and re-seasoned. I used the same procedure as outlined above. It is seasoned with Crisco. Nothing on it indicates the manufacturer.
They will all probably need to be seasoned more, but they are in much better shape now.