10 Ducats (Portugał koronny) - Sigismund III Vasa (Malbork mint)

The Malbork mint operated under lease arrangements throughout much of the late sixteenth century, with the city's access to Baltic trade networks making it a logical site for high-denomination gold production destined for international commerce rather than domestic circulation. Ten-ducat pieces of this type functioned essentially as bullion instruments and diplomatic gifts — few would have passed through ordinary hands.

Sigismund III's early reign saw persistent tension with the Sejm over mint policy and coin quality, and large gold multiples like this one were produced in very limited runs, often to order. Kopicki 1434 is among the rarer citations in the Commonwealth gold series.