Casimir the Great Grosz

Casimir the Great's grosz standardized Poland's currency during his economic reforms, replacing a hodgepodge of foreign and debased coins with a reliable silver standard.

These coins were struck in various mints, likely Kraków among them, using silver from local mines. The obverse bore the king's effigy, while the reverse showed a simple cross or shield. Sizes varied, but most weighed around 1.5 grams, a deliberate choice to ease trade across borders. I can't pinpoint exact production numbers; records from that era are scarce, probably lost in later conflicts.

One thing's for sure: after thirty years of handling these, the idea that every grosz hides a royal secret is as worn as the coins themselves.