When was "Minerva clock" created?

This artwork was created ca. 1770.

What medium is "Minerva clock"?

Minerva clock is Gilt bronze, marble, enamel, brass, steel.

Yes, Minerva clock is in the public domain and available for free download under CC0 license.

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Minerva clock was created by Theodore Rodel|Vincenti et Cie|Matthew Boulton|Henri-Charles Baltazard|Louis-Charles Baltazard in ca. 1770.

Theodore Rodel|Vincenti et Cie|Matthew Boulton|Henri-Charles Baltazard|Louis-Charles Baltazard, ca. 1770