Help rate (old copper powder-box with the miniature on enamel)

[Korsy]

Here is a pantry godsend. Copper powder-box resembles a round shell with a miniature in enamel ( on top ) . Diameter powder- 50 mm , the height of the convex point of 7 mm . Photos are attached . Photo thumbnails are not very good with a flash picture is distorted , but without the flash extremely dark , but as reflecting the colors of the miniature. I would appreciate any helpful comments about the discovery .

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