1 Kreuzer - Frederick William III

Prussia had no business minting Kreuzer. The denomination belonged to the currency systems of southern German states, and these pieces were struck specifically for the newly acquired Franconian territories absorbed following the territorial reorganization of 1803–1806. Frederick William III needed circulating small change compatible with what Franconian subjects already understood — issuing Brandenburg Groschen into those markets would have been administratively useless.

The window closed quickly. Prussian control over the Franconian districts effectively ended after Jena-Auerstedt in October 1806, and the subsequent Napoleonic reorganization stripped Prussia of these holdings entirely by 1807.