Attica foundry commerative cast iron skillet

Many decades ago my dad worked at the Attica NY Westinghouse foundry (yes there's a famous prison there too) and he got this fry pan before the plant closed. It was hung on the wall for a very long time, then when they moved I took it and it has been in a box and never used. Now I want a small pan for use while camping, so I dug it out. I have to admit I'm not a collector, and my online searches turned up nothing as to it's value. The question is do I just use it, assuming it has minimal value, or should I keep it in unused condition as a rare find?