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Nassau Kronenthaler, 1817
The Kronenthaler was a silver coin first issued in 1755 in the Austrian Netherlands (see Austrian Netherlands Kronenthaler). It contained one ninth of a Cologne mark of silver and was thus equal to the Reichsthaler of the Leipzig convention. Most examples show the bust of the Austrian ruler on the obverse and three or four crowns on the reverse, hence the name which means "crown thaler" (also Brabanter and crocione (Italian). After the Austrian Netherlands was occupied by France, several German states (e.g., Bavaria, Baden, Hesse-Darmstadt, Württemberg) issued Kronenthaler, as it had become a popular trade coin.
Kronenthaler with 3 crowns in 1797 - Franciscus II