I have never seen a plus mark stamp like is on the bottom of this one. The item "1880s ERIE Cast Iron SKILLET Frying Pan #9 w PLUS SIGN MARK Pre-Griswold 11" is in sale since Saturday, September 22, 2018. This item is in the category "Collectibles\Kitchen & Home\Kitchenware\Cookware\Cast Iron". The seller is "trammellfan03" and is located in Xenia, Ohio.
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