I am puzzled as to what this piece is. I have googled most everything and come up empty handed. My thought is that it was an accessory for a stove maker that only had 10" openings and the ring would adapt to a smaller size for more common cook pans. It has no I.D. marks or numbers...It was very rusty and pitted and I did an E-Tank cleaning and seasoned it best I could. As a bonus I made some corn bread in my Puritan corn wheat pan and had a bit left so I did a small pone in my Griswold size 0 just for grins.

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