Very interesting old piece! We're not sure what it's made of- it appears to be plated or have a thin layer of metal? over metal? The metal on the outside is brittle in some places. Bought at an auction in Europe many years ago. Covered in figures, animals and encircled with a band of script. Patina appears authentic-we showed it to some local antique dealers in person who agreed that it seems to be a very old piece-possibly very early.  It may have been dug up or excavated? There is what looks like dirt embedded throughout. About 13"

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