Small Copper-Washed Dish with Witch, Commemorating 1692 Salem in Knoxville, Tennessee For Sale

This base-metal dish with a copper wash is commemorating the Salem Witch Trials of xxxx, according to the embossed inscription under the image. The image is of a rather comely young woman with tall pointed hat and long flowing hair and gown riding a broom across the sky with a full moon and clouds in the background. Images on the rim of the plate alternate a pair of crossed brooms with the face of a cat, with pointed ears and prominent whiskers. The dish is 4-3/4 inches in diameter and 1 inch in height.
I have uncovered the following information about the design on this dish:
I have found a “souvenier plate” with the same design, dated circa xxxx, “Designed and imported by Daniel Low & Co. Salem, Mass, Manfd. by Frank Beardmore & Co. Fenton England” between xxxx and xxxx. This plate is a china plate that was available in three color finishes. My source indicates the plates rarely sell for less than $150 (the lowest referenced was $65) and have sold for as much as $250. (One with a gold leaf ring around it offered for $328 in a March, xxxx ebay auction, but indication is that it “ended” rather than that it was “sold”.) This source goes on to describe the same witch design on one other object, a small base-metal dish with a copper wash on it. And that, folks, is what my little dish is. One of the china versions is also pictured below for reference.
I have found another reference to a xxxx auction in which one of these metal dishes was sold. It was described there as a “spelter plate”. There was no indication of its price. Spelter can be various alloys of zinc with copper and or lead, used in the late xxxxs and early xxxxs as a cheap substitute for bronze. So perhaps the copper wash was intended to make it appear more like bronze.
I will be investigating this further. I hope to determine whether the ceramic plate and the metal dish were contemporaneous designs, or whether one predated the other.
Sale price $TBD. Come see it and make an offer before I post it on ebay. If anyone has any additional info about this dish I would love to hear it.
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Location: 671 (Google Maps) or 871 (Yahoo Maps) or 941 (physical address) East Tri-County Blvd. , Oliver Springs, about 2 miles from West Outer Dr. in Oak Ridge. This is a storage location so an appointment is required.
Can meet in West Knoxville, Oak Ridge, Oliver Springs. Will ship if prepaid via Paypal, and you pay UPS/FedEx agent directly. In storage in Oliver Springs.