John Casimir Vasa Ducat

In the midst of the Swedish Deluge that ravaged Poland in 1655, John Casimir's ducats were struck from gold supplies that often included melted-down foreign coins, a pragmatic response to wartime shortages.

That meant planchets sometimes carried faint traces of earlier designs, like ghostly echoes from Spanish or Dutch origins. The obverse typically bore the king's profile, his features stern and unadorned, while the reverse featured the Polish eagle with a scepter.

Variations depended on the mint, such as Warsaw or Gdańsk, but details like exact weights varied too—most weighed around 3.5 grams, though that's an estimate from surviving examples. As for production totals, records are murky; whatever archives existed likely burned in later conflicts.

Collectors note the occasional die clash, a minor flaw that speaks to rushed craftsmanship. It's a coin that outlasted its era, if not always its polish.