1 Ducat - Gustav Adolphus

Gustav Adolphus of Mecklenburg-Güstrow ruled one of the two halves produced by the 1621 partition of Mecklenburg between the Güstrow and Schwerin lines. The duchy was among the most devastated German territories of the Thirty Years' War — Swedish and Imperial armies fought repeatedly across its soil, and the ducal house spent years in exile. By the time Gustav Adolphus began issuing gold, the territory was still slowly rebuilding its administrative and fiscal infrastructure, making sustained gold coinage a deliberate assertion of sovereign standing rather than routine production.

The eighteen-year span of this type almost certainly masks multiple die marriages. Kunkel's numbering suggests limited surviving examples, and pieces attributed to the later years of the reign are considerably scarcer.