I think you are right, Kardinalisimo. Another source says it is Japanese Arita (Imari) porcelain, pre-1800. And there's an example on ebay with...
I'm not sure I see any spur marks. But I'm also a bit unsure what I should be looking for.
Would appreciate any additional information about a Chinese porcelain charger, about 18" diameter. On the back are several 1/2" metal staples...
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