Duchy of Warsaw 10 Groszy

The Duchy of Warsaw's 10 Groszy coin was struck using silver planchets often recycled from melted Spanish reales, a frugal adaptation to the shortages of the Napoleonic Wars.

This made for coins that sometimes carried faint traces of older designs, like ghostly imprints from their previous lives. The obverse showed the Polish white eagle, a symbol of fleeting independence, while the reverse simply stated the value and year. Mintage numbers remain uncertain; Warsaw Mint records from 1807 to 1815 were likely destroyed in later conflicts.

Weights varied slightly due to the recycling process, with most pieces around 2.7 grams of .375 fine silver. That inconsistency kept things interesting for authenticators. As for myths about Napoleon's personal oversight, let's just say he had bigger battles to fight.