HELP WITH "MYSTERY PIECE" REQUESTED - what is it a

Hello everyone… I’m sure hoping that there is someone out there that can help me identify exactly what this item is and perhaps the manufacturer of it.

It is from an estate, sterling silver and bears the mark of a letter C inside a pie shaped symbol.

It is about 5" long when open, hinged in the middle and looks like it might have had a ribbon or something strung from the bottom through the slit.

Gee, if anyone knows anything about this piece, it would be great to get any feedback. Thanks. Holly
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