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1 Ducat - George Frederick
| Issuer | Duchy of Prussia |
|---|---|
| Year | 1587-1597 |
| Type | Standard circulation coin |
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| Obverse description | Full-length armored effigy of Duke George Frederick standing facing, clad in elaborately detailed plate armor with ruff collar, holding a sword at his side with the right hand and an orb or glove in the left. The figure is rendered in high relief in the late Renaissance style characteristic of Königsberg ducats. A beaded inner border frames the design, with the ducal legend distributed around the periphery in Latin capitals. |
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| Reverse lettering | MONE: NOVA. AVREA. DVCA. PRVSS. |
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| Additional information |
George Frederick of Brandenburg-Ansbach administered Prussia as regent after the incapacitation of his cousin Albert Frederick, whose mental deterioration left him unfit to rule from the early 1570s onward. The regency, formally granted by the Polish crown — Prussia remained a Polish fief — lasted until George Frederick's own death in 1603, making this a coinage of administrative necessity rather than sovereign rule in the conventional sense.
The .979 fineness conforms to the ducat standard maintained across the Holy Roman Empire following the Frankfurt Convention of 1585, which attempted to stabilize gold coinage amid widespread debasement by smaller states.