Yes.... Even if the ...cooking side.... looks a bit ...unkept... and the stove side looks ...crusty.... that is evidence the cast iron was used on a wood stove with the lid off and the pan directly exposed to the fire... Which is how they were ment to be used.. Tottaly acceptable unless you are going to use the cast iron on a glass top or other more ...delicate.... heat source... That is why some older cast iron has a raised ...ring... on the bottom to fit and seal on the opening of a wood kitchen range instead of a smooth bottom like more modern cast iron has..
I did have several pieces of cast iron cookware I used on my HOBO stove, fire pit or smoker that my ...significant other... would not allow in the house on her ...nice... stove. Which was an acceptable arrangement..
My 5 cents of person experience..