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| Issuer | Royal Prussian Mint |
|---|---|
| Year | 1858-1859 |
| Type | Standard circulation coin |
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| Obverse description | Log in to see details |
|---|---|
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| Obverse lettering | FRIEDR.WILHELM IV KOENIG V.PREUSSEN A |
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| Edge | Lettered: GOTT MIT UNS |
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| Additional information |
The Vereinsthaler — the "Union thaler" — emerged from the Vienna Coinage Treaty of 1857, which unified the monetary systems of Austria and the German states on a common silver standard. Prussia adopted the new convention immediately, and the double Vereinsthaler was struck as a high-value coin meant to circulate across member states without exchange penalties. Frederick William IV was by 1858 in the grip of severe mental decline following a series of strokes; his brother Wilhelm served as regent from October of that year.
The two-year emission window reflects the king's death in January 1861 and the subsequent retooling for his successor's coinage.