Just ran across these pictures of a John Wright California Acorn pan I have. It is easy to confuse with the Lodge pan if you don't know what you are looking at.
Overall, the Wright pan is smaller and the acorns don't go to the edge of the pan. Only black iron as far as I know. Only Wright one I've ever seen. Just as guess at age, maybe 1970s.
The Lodge pan is significantly larger, the acorns nearly touch the outside of the pan, and it comes in chrome and black iron. Lodge picture is number 3.
And yes folks, there really is a California Acorn. I think it is the California Live Oak, Quercus agrifolia.
Tom