1⁄12 Reichsthaler

Dortmund's status as a Free Imperial City gave it the right to strike its own coinage, a privilege it exercised sporadically and often under financial duress. The Seven Years' War, grinding through its third and fourth years in 1758–59, disrupted trade routes across the Holy Roman Empire and put enormous pressure on municipal treasuries. This issue almost certainly reflects that fiscal strain — small silver fractions were the workhorse of wartime commerce, and city mints that had been dormant for years were pressed back into service.

Dortmund's minting operation was never prolific; surviving pieces from this two-year window are scarce, particularly in undamaged condition.