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Ort koronny / 18 Groszy - Jan II Kazimierz Waza Poznań mint
| Issuer | Polish–Lithuanian Commonwealth |
|---|---|
| Year | 1651-1659 |
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| Value | Log in to see details |
| Currency | Log in to see details |
| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
| Shape | Round |
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| Obverse description | Log in to see details |
|---|---|
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| Reverse description | Crowned quartered coat of arms of Poland-Lithuania, displaying the Polish eagle and Lithuanian Pahonia in alternating quarters, with the Vasa dynastic arms (a sheaf over a river) on an escutcheon at center. The large royal crown surmounts the shield, and the denomination numerals and mint-master's initials flank the shield on either side. A small ox head mintmark divides the reverse legend at the base (6 o'clock position), and the date appears within the circumferential Latin legend. |
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| Edge | Log in to see details |
| Mint | Poznań Mint (Posnania) |
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| Additional information |
Jan II Kazimierz inherited a Commonwealth already under severe fiscal strain, and the Swedish invasion of 1655 — the Deluge — shattered what remained of monetary stability. The Poznań mint, briefly occupied and disrupted during the conflict, nonetheless continued striking orts through this period, making year-by-year survival rates uneven. The documented reduction in fineness and weight from 1656 onward was not accidental policy reform but a direct consequence of depleted treasury reserves and the cost of sustained warfare on multiple fronts simultaneously.
The proliferation of Koppicki references across this type reflects genuine die variation between years rather than collector taxonomy for its own sake.