I wanted to introduce myself and thank the forum administration for approving my registration. I'm currently studying environmental law in Greensboro, NC. My classes constantly introduce me to health and environmental problems stemming from new and inadequately tested chemicals in everyday products. So naturally, I was drawn to cast iron instead of pans with synthetic coating.
As a recent convert to cast iron cookware, especially antique cast iron, I'm trying to learn all I can about restoration and care. I started about a year ago with two modern Lodge pieces: a 10" skillet and a 12" grill pan. After pretty consistent daily use, I felt confident that I knew how to not destroy cast iron pieces and rewarded myself with my first project. I found a smooth-surface skillet at a local antique store for $20; it had a little rust, which was a plus for me since I was looking for a candidate for restoration practice.
After stripping the pan, the bottom marking became clearly visible: John C. Johnson Company of Birmingham, Ala. The lettering was more visible before I reseasoned it, but the pictures make it seem like it is less visible than it really is in-person. After searching the patent number, I think it was made in the late 1930s. I'm pretty sure it wouldn't fetch a high price online, but it's valuable to me as the first piece I've restored. I've attached photos. Sorry if they're overly shinny, I just put another coat of oil on.