I found this yesterday at an Antique market. Not sure exactly what it is, but have a gut suspicion it is some type of Transposition Spool Insulator that has been undocumented. The item is embossed with "GREGORYS PAT, AUG 17th 1869". A search on the patent has yielded NO results for this, which leads me to wonder if this may be an unknown foreign example. Any help figuring this one out will be greatly appreciated!!

It is about 2 1/2 inches in length and 2 3/4 inches in width (top part). Also curious of any value associated with it. Please email me your thoughts or ideas regarding this thing!!

Thanks to Bob Stahr for this info: It is an antique FRUIT JAR lid!! Who would have guessed!! Thanks to everyone for help in identifying this!!