Dukat koronny - Jan II Kazimierz Waza Lwów mint

Jan II Kazimierz abdicated in 1668 after one of the most catastrophic reigns in Polish history — the Swedish invasions known as "the Deluge," Cossack uprisings, Muscovite incursions, and Ottoman pressure had collectively reduced the Commonwealth's population by an estimated one-third. The Lwów mint operated intermittently during this period precisely because the capital Warsaw had fallen; Lwów became a refuge for both the royal court and what remained of functioning state infrastructure.

Kopicki 1879 is a notably scarce attribution for this mint and year, with surviving examples concentrated almost entirely in Polish institutional collections.