Szeląg gdański - Jan II Kazimierz Waza Gdańsk mint

These szelągi were struck at the Gdańsk mint during one of the most catastrophic periods in Polish history — the so-called "Deluge," when Swedish, Brandenburgian, Transylvanian, and Cossack forces simultaneously occupied large portions of the Commonwealth. Gdańsk, which had successfully resisted Swedish siege, remained one of the few functioning mint cities in the country during these years, making its output disproportionately important to whatever monetary stability the Crown could maintain.

The billon content at roughly 9.4% silver reflects cumulative debasement across John II Casimir's reign, driven by war financing. Kopicki distinguishes two varieties across #7605 and #7606, differentiated by die details rather than metal composition.