The shape of the handle and the reinforced edges on the bottom rim are the same as you would find on the ERIE griddles by Griswold. The number on the underside of the handle is a characteristic of what is considered a first series of this griddle style. Once it's cleaned up you will maybe find the ERIE mark on the bottom of the griddle near the 12:00 position, although I have a #7 with all these same characteristics but no ERIE mark - an unknown at that point, at least to me.
