CHAMBELLAN KEY, in finely chased gilt bronze. Openwork ring featuring the crowned two-headed eagle of the Holy Roman Empire holding a scepter and sword in its claws. Escutcheon with the numeral JII on one side and MT on the other. Round shaft and cloverleaf bit. Period of the reigns of Maria Theresa and Joseph II (1765-1790). L. 18 cm

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