1 Silbergroschen - Frederick William III Pattern

The 1819 date places this pattern squarely in the period of Prussian monetary reform following the Napoleonic wars, when the kingdom was rationalizing a chaotic mix of inherited coinages from its fragmented pre-war territories. The Silbergroschen system that eventually emerged from this process was formalized under the Prussian Münzedikt of 1821 — meaning this piece predates the actual authorization by two years.

The billon composition at .222 fine reflects the compromise metallurgy being tested before that standard was settled.