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.
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.