What medium is "Pistole (1/4 ducat) of the Canton of Zurich, Switzerland,"?

Pistole (1/4 ducat) of the Canton of Zurich, Switzerland, is Gold.

Is "Pistole (1/4 ducat) of the Canton of Zurich, Switzerland," in the public domain?

Yes, Pistole (1/4 ducat) of the Canton of Zurich, Switzerland, is in the public domain and available for free download under CC0 license.

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Unknown Artist, 1751